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Gender determination during pregnancy | When can you tell? How to tell by ultrasound and baby nub - boy or girl

The Complete Guide to Determining Your Baby's Gender During Pregnancy

Ultrasound, baby nub, and explanations by week

From the moment I found out I was pregnant,

Many pregnant women are concerned about

You may be wondering, "Is the baby in my belly a boy or a girl?"

People around me often ask me, "Have you found out the gender?"

I was excited, but I was also wondering, "When will I know?"

Many people feel anxious.

In this article, we will discuss gender determination during pregnancy.

Based on the knowledge of obstetrician-gynecologists,

From how to distinguish between ultrasound images to the latest baby nub detection methods,

We'll explain everything in detail.

Your doubts and worries,

Hopefully by the time you finish reading this article, the problem will be solved.

"When will we know the gender?" That question,

It's actually a sign of deep love.

Why are you concerned about the gender during pregnancy? Psychological reasons

Concerns about gender during pregnancy

It's definitely not because I'm impatient.

In fact, this is a deep love for the baby,

It's a natural expression of maternal instinct.

According to psychological studies,

There are three main reasons why pregnant women want to know the gender of their baby:

[1. Concrete Formation for Attachment Formation]

The baby in the womb,

It is a manifestation of the desire to feel something more concrete.

By going from "this child" to "this boy" or "this girl,"

It will deepen your attachment to your baby.

2. Peace of mind in preparation

When thinking of a name or choosing baby products,

Knowing the gender will help you prepare better.

This is also an expression of a sense of responsibility to be a good mother.

3. Communication with others

When talking about your baby with family and friends,

Knowing the gender makes the conversation easier.

Especially if you have older children,

It also provides a topic for discussion about sibling relationships.

Wanting to know the gender

There's no need to feel guilty

Some people say, "It doesn't matter what gender it is,

Why am I so concerned about this?"

Some pregnant women blame themselves.

But it's okay.

The desire to know the gender

It's a very natural and healthy emotion.

In fact, in a survey conducted in obstetrics and gynecology,

Approximately 85% of pregnant women answered that they would like to know the gender as soon as possible .

Your feelings are

It's a normal feeling shared by many pregnant women.

The gap between gender expectations and reality

Some people say, "I hope it's a boy," or "I hope it's a girl."

Some people have hope.

This is not necessarily a bad thing.

However, even if it doesn't meet your expectations,

Your newborn baby is undoubtedly your precious child.

Many experienced mothers agree that

"I was obsessed with gender,

The moment I was born, none of that mattered."

"Either way, my child is the cutest in the world."

That's the word.

👉 A closer look at the mystery of why gender is determined at the moment of conception

💡Check out our week-by-week guide to find out the gender at exactly what week

[Shocking truth] Gender is determined 0.1 seconds after conception!

The mystery of XY chromosomes

The miracle of gender determination that occurs at the moment of fertilization

When will the baby's gender be determined?

The answer to this question is,

This is much sooner than many people would imagine.

In fact, gender is determined at the moment of fertilization when the sperm and egg meet.

The decision is made in just 0.1 seconds.

At this very moment, it is decided whether the baby will be a boy or a girl.

It's completely decided.

Changing gender during pregnancy

It's biologically impossible.

X and Y chromosomes: the tiny giants that determine gender

Gender is determined by

These are special chromosomes called "sex chromosomes."

[X chromosome]

• Chromosomes that carry female genetic information

• A mother's egg always contains an X chromosome.

• There is about a 50% chance that the father's sperm will also contain an X chromosome.

[Y chromosome]

• Chromosomes that carry male genetic information

• It is never found in a mother's egg.

• It is found only in the father's sperm, with a probability of about 50%

A little more detail on the moment of gender determination

At the moment of fertilization,

This is the drama that is unfolding.

[Pattern 1: When a girl is born]

Maternal X chromosome + Father's X chromosome = XX (girl)

[Pattern 2: If a boy is born]

Mother's X chromosome + Father's Y chromosome = XY (boy)

In other words, it is the father's sperm that determines the baby's gender .

This is a biological fact

Moms have no control over gender.

Even if people around you say things like, "You have to have a boy," or "It's a shame you didn't have a girl,"

That is a completely irrelevant statement.

Why is the male-female birth ratio approximately 50:50?

Anywhere in the world,

The ratio of boys to girls at birth is roughly equal.

This means that about half of the father's sperm carry an X chromosome.

The other half has a Y chromosome.

In other words, the theoretical probability of having a boy is

There is a 50% chance of having a girl .

However, in actual statistics,

There are slightly more boys than girls born.

This is because sperm carrying the Y chromosome are slightly lighter and swim faster.

This is thought to be due to a slightly higher chance of successful fertilization.

Developmental processes after sex determination

After sex is determined at fertilization,

The actual differences between boys and girls start to become apparent around the sixth or seventh week of pregnancy.

[6-8 weeks pregnant]

Internal reproductive organs (testes and ovaries) begin to develop

[8 to 12 weeks pregnant]

The secretion of male hormones (testosterone) begins

External genitalia differentiate

[After 12 weeks of pregnancy]

The external genitalia become more clearly defined,

An ultrasound scan can determine the gender

👉Let 's take a closer look at how many weeks it takes to find out the gender of your baby.

💡Learn how to tell the gender from an ultrasound image

"Gender determination calendar" by pregnancy week

Is it true that it's a boy at 14 weeks and a girl at 17 weeks?

Is it true that boys are born at 14 weeks and girls at 17 weeks?

It is often said that "you can tell if you're having a boy around 14 weeks of pregnancy and a girl around 17 weeks of pregnancy", but

Is this true?

The answer is "generally correct, but there are large individual differences."

Looking at the actual statistical data from obstetrics and gynecology departments,

The results are surprising.

[For boys]

• 14 weeks pregnant: Detectable in approximately 60% of cases

• 16 weeks pregnant: Detectable in approximately 80% of cases

• 18 weeks pregnant: Approximately 95% of cases can be diagnosed

[For girls]

• 17 weeks pregnant: Approximately 50% of cases can be diagnosed

• 19 weeks pregnant: Approximately 75% of cases can be diagnosed

• 21 weeks pregnant: Approximately 90% of cases can be diagnosed

Why do boys understand it earlier?

Why do you think boys' gender is revealed earlier than girls'?

The difference lies in the structure of the external genitalia.

[Characteristics of boys' external genitalia]

• The penis is easily visible as a protrusion

• It is easy to see as a white shadow on the ultrasound image.

• Appears as a "peanut-shaped" or "small mushroom-shaped"

[Characteristics of girls' external genitalia]

• The vulva is flat and inconspicuous

• Appears as "three lines," "leaf-shaped," or "coffee bean-shaped"

• It is difficult to check if your legs are closed.

Detailed guide to determining gender by week

[10th to 13th week of pregnancy: Very early diagnosis period]

One way to determine this stage is by looking at the angle of the genital tubercle, called the "baby nub."

However, this is not performed during general prenatal checkups.

[14-15 weeks pregnant: Start determining whether a boy is a boy]

In boys, the external genitalia can be seen with an ultrasound around this time.

However, they are still small and easy to miss.

[16-18 weeks pregnant: full-scale gender determination period]

Boys can be judged fairly reliably.

Girls can also be judged from this time on,

It's not certain yet.

[19-21 weeks pregnant: period for reliable determination]

It will be possible to determine the gender of both men and women with almost certainty.

In many obstetrics and gynecology departments,

At this stage, the gender will be confirmed.

[After 22 weeks of pregnancy: the absolute certainty period]

The external genitalia are fully developed

Accurate determination is possible with a probability of over 99%.

How to prepare for when "I still can't find anything during this health check"

If you are not sure of the gender even though the pregnancy is progressing,

It makes you feel anxious, doesn't it?

But it's okay.

It's not uncommon for the gender to be unknown.

[Common reasons]

• Baby has closed legs

• The baby is in a breech position, making the external genitalia difficult to see.

• The umbilical cord is in front of the external genitalia

• The image is unclear due to the small amount of amniotic fluid.

• The baby moves and the timing of the photo is not right.

This has absolutely nothing to do with the health of the baby.

This is a temporary situation.

At the next checkup, the baby had changed position.

There is a high possibility that the gender will be clearly identified.

It is important to wait patiently.

Gender determination in the case of twins

If you are pregnant with twins:

What about gender determination?

In fact, it gets more complicated.

[In the case of identical twins]

• Must be of the same gender (male-male or female-female)

• If you know one, the other is the same gender.

[In the case of fraternal twins]

• Any gender combination (male-male, female-female, male-female)

• Each must be judged separately

• Even if you know the gender of one, you need to confirm the other separately.

In the case of twins, their bodies often overlap and it is difficult to see each other,

It may take longer to determine the sex than in a single pregnancy.

👉Learn more about how to tell the gender from an ultrasound image

💡Check out the "baby nub" detection method that can be used from the 10th week of pregnancy

[How to read ultrasound images] Protrusions, three lines, leaf shapes

Professional tips to distinguish

Are you reading ultrasound images correctly?

While looking at the ultrasound images I received during my prenatal checkup,

Have you ever wondered, "What part of your body indicates your gender?"

It's hard to read gender from a grainy black and white image.

It's actually very difficult.

But if you know the trick,

You too will begin to see "gender signs" on ultrasound images.

Ultrasound photo of a baby boy: Tips for finding the "bump"

For boys,

What does it look like on an ultrasound image?

[Characteristic signs of boys]

• White bumps visible between the legs

• Long, vertical shape like a "peanut"

• Rounded tip like a "small mushroom"

• Sometimes it looks like an "arrow"

When an obstetrician-gynecologist determines that "it's a boy,"

Actually, I see this feature.

[Points that professionals look at]

• The protrusion is longer than a certain length

• Rounded tip

• Located in a position that can be distinguished from the umbilical cord

• Can be viewed from multiple angles

Even if you think, "Is that the white part?"

It often turns out to be the umbilical cord.

Doctors always check from multiple angles before making a diagnosis.

Ultrasound images of girls: How to distinguish between "three lines" and "leaf-shaped"

The girl's judgement is

The reality is that it's even more difficult for girls than boys.

Because it's not "I can see something,"

This is because it is judged by whether it "looks like a certain shape."

[Characteristic signs of girls]

• "Three lines": The folds of the vulva appear as three lines.

• "Leaf-shaped": The entire vulva is shaped like a leaf.

• "Coffee bean shape": an oval shape with a vertical line inside

• "Butterfly type": A symmetrical wing-like shape

These signs are

The appearance varies greatly depending on the angle of the baby and the state of the amniotic fluid.

Therefore, it often takes time to determine the gender of a girl.

Things to note when looking at ultrasound images

When trying to interpret an ultrasound image yourself,

There are some things you should be careful about.

Common mistakes

• Mistaking the umbilical cord for a baby boy's bump

• Mistaking feet and hands for external genitalia

• Mistaking shadows and image noise as gender signs

• Judging from only one angle

Even doctors can make mistakes,

Echocardiograms are difficult to interpret.

It's fun to speculate, "Maybe it's a boy?" or "Maybe it's a girl?"

Always consult a doctor for a definitive diagnosis.

3D and 4D ultrasound for clearer images

Recently, an increasing number of clinics are using 3D and 4D ultrasound to determine gender.

Compared to conventional 2D echo,

What are the benefits?

[Advantages of 3D and 4D ultrasound]

• It looks three-dimensional, making it easy to judge the shape.

• You can see the parts hidden in the shadows

• See the movement in real time (4D)

• Improves the accuracy of doctors' judgments

However, even with 3D and 4D ultrasound,

It may be difficult to determine depending on the position of the baby and the state of the amniotic fluid.

There's no need to be disheartened by the fact that "even the latest equipment couldn't figure it out."

That is how delicate and difficult sex determination is.

How to enjoy ultrasound photos with your family

The echo photograph is

It is an important tool for the whole family to get to know your baby.

In addition to gender determination,

Here are some ways to enjoy it.

[How to enjoy ultrasound photos]

• Record changes in your baby's size

• Observe limb movements

• See changes in facial contours

• Watch with your partner or older child

• Save it as a memento in your maternal and child health handbook

Gender is also important,

The greatest value of an ultrasound image is that it is proof that your baby is growing healthily.

Every ultrasound photo,

The joy of being able to see your child grow little by little,

Please take good care of it.

👉 Learn the latest methods for detecting "baby nub" that can be used from 10 weeks pregnant

💡Check out how to ask your doctor about the gender

Use "BabyNav" to determine gender from 10 weeks pregnant!

30 degree spinal angle measurement method

What is a Baby Nub? ~The latest early gender determination method

Have you ever heard the term "baby nub"?

This allows you to predict the gender from as early as 10 weeks of pregnancy.

It's a groundbreaking method.

It is already widely known in Europe and the United States,

It has become a hot topic in Japan, especially on social media.

What is "Baby Nub"?

• Means "baby bump" in English

• Sex is determined by the angle of the genital tubercle

• Can be determined as early as 10-13 weeks of pregnancy

• 7 to 10 weeks earlier than normal ultrasound results

What is the genital tubercle? ~ The prototype of the genitals common to both men and women

To understand the baby nub test,

First, let's learn about the "genital tubercle."

Around 8 to 12 weeks of pregnancy

Babies have a small protrusion called the "genital tubercle" that is gender-neutral.

This protrusion will later become a penis in boys.

In girls, it develops into the clitoris.

[Development of the genital tubercle]

• 8 weeks pregnant: A small protuberance of the same shape appears in both men and women.

• 10 weeks pregnant: subtle differences in angles begin to appear

• 12 weeks pregnant: The difference in angles becomes more apparent

• After 14 weeks of pregnancy: clearly distinct external genitalia develop

The 30-degree rule: Tips for measuring baby nub angles

The most important thing in determining baby nub is

the genital tubercle and the spinal angle.

How do we measure it?

[Basic rules for angle measurement]

• Measure with baby lying on his/her side

• The spine is the reference line (0 degrees)

• Measure the angle relative to the orientation of the genital tubercle

• 30 degrees is the dividing line between men and women

【Judgment criteria】

• More than 30 degrees upwards → High probability of having a boy

• Less than 10 degrees downwards → High probability of having a girl

• 10 to 30 degrees → A gray area that is difficult to judge

How accurate is baby nub detection?

Many people may be wondering, "Can we really know that early?"

Let's look at some overseas research data.

[Judgment accuracy by week]

• 11 weeks pregnant: Approximately 70% accuracy

• 12 weeks pregnant: Approximately 85% accuracy

• 13 weeks pregnant: Approximately 95% accuracy

According to the expert's judgment,

High accuracy of 95% has been reported at 13 weeks of pregnancy.

However, this is only possible if the diagnosis is made by a doctor or a specialist technician.

The accuracy of self-assessment by the general public is as follows:

It will be lower than this.

Limitations and precautions for baby nub detection

Baby Nab is an appealing method, but

There are some limitations.

[Cases where it is difficult to judge]

• If your baby is facing forward or backward

• If the genital tubercle is in a position that is difficult to see

• If there is little amniotic fluid and the image is unclear

• If you have a multiple pregnancy and other babies are on top of you

[Important Note]

• It is not a medically necessary test

• It is speculation rather than a definitive diagnosis

• There is a good chance of error

• Just think of it as a form of entertainment.

Can I get a baby nub test in Japan?

Some of you may be thinking, "I'd like to have a baby nub test."

However, in many obstetrics and gynecology departments in Japan,

Baby nub testing is not common.

[Current situation in Japan]

• Not performed in general prenatal checkups

• It is considered medically unnecessary

• Some clinics may offer this service.

• Information for self-diagnosis is spreading on social media

If you're interested,

Please consult your doctor during your prenatal checkups.

However, even if you strongly wish to know the gender using the babynap,

Please understand that some doctors may not be able to accommodate your request.

Find the baby's nub on an ultrasound image

If you have ultrasound images from 10-13 weeks of pregnancy,

It might be fun to try and find the baby nub.

[Points to consider when searching]

• Find a photo of your baby lying on their side.

• Check the alignment of your spine

• Look for small bumps around the base of the feet

• Imagine the angle

However, please think of this as just one of the fun parts.

Reliable sex determination is

It's best to wait until the middle of your pregnancy for an ultrasound.

👉Learn how to ask your doctor about the gender and why they might not tell you

💡Check out what to do if you don't know the gender

The magic way to ask when you can't say, "Teacher, tell me the gender!"

Doctors' honest opinions and effective consultation methods

Why is it difficult to say, "Tell me your gender"?

During prenatal checkups,

I want to say, "Please let me know when you find out the gender."

I'm sure there are many people who find it difficult to bring themselves to speak up.

There are actually several psychological reasons for this.

[Why it's hard to say]

• Feeling guilty that "health is more important than sex, so maybe it's inappropriate"

• The doctor seems busy, so I feel bad asking unnecessary questions.

• I'm afraid of being told, "It's too early."

• What if the hospital has a policy of not disclosing information?

But don't worry.

The desire to know the gender

It's a very natural and healthy emotion.

How to ask the "gender question" so doctors will be pleased

So how can you ask your doctor a question that will give you a satisfactory answer?

[Magic listening phrases]

"Doctor, how is the baby?

If they are growing well,

I would be happy if you could let me know the gender as soon as you know it."

This phrase includes:

There are many elements that will reassure doctors.

【Why this phrase is good】

• They care about the baby's health first.

• Communicate that you prioritize health over gender

• Don't rush me by saying "As soon as I know"

• Polite and grateful

7 reasons why doctors won't tell you the gender

Sometimes the gender is known but the doctor won't tell you.

Why is that?

In fact, doctors have their own reasons for being doctors.

Reason 1: Hospital policy

Some hospitals have a policy of not disclosing the gender of the baby until birth.

This is not for medical reasons,

It depends on the hospital's thinking.

Reason 2: It's not yet certain

Even if the doctor thinks, "It's about 70% likely to be a boy,"

We may not tell you unless we are certain.

This is to avoid giving out incorrect information.

[Reason 3: It will look clearer next time]

"It's a little hard to see this time, so let's try next time."

Your doctor may be able to make a decision.

This is to ensure that the information is conveyed in a more reliable manner.

[Reason 4: Ethical considerations]

The Japan Society of Obstetrics and Gynecology

There is a view that "gender should not be taught lightly."

This is a consideration to prevent sex selection.

[Reason 5: Time constraints]

Prenatal checkups require checking many things in a limited amount of time.

You may not have time to determine the sex.

[Reason 6: Technical difficulties]

Depending on the old ultrasound equipment and the position of the baby,

It may be difficult to make a clear judgment.

Reason 7: Conservative personality

Some doctors say, "I won't say anything unless I'm 100% sure."

Some are cautious.

How to deal with hospitals that won't tell you

If your hospital won't tell you the gender,

What should I do?

[Solution 1: Ask the reason]

"When will we find out the gender?"

"Isn't this a hospital policy?"

Let's ask politely.

Solution 2: Look forward to next time

Even if it doesn't work this time,

The situation may change at your next checkup.

Let's wait patiently.

Solution 3: Consult another doctor

Even at the same hospital, the treatment may change depending on the doctor in charge.

(However, this is not expected if it is a hospital-wide policy.)

Solution 4: Get a second opinion

If you really want to know,

You can also consult with other clinics that offer gender determination services.

However, it may be costly.

Doctors' Honest Thoughts: What They Think About "Gender Questions"

as a matter of fact,

What do doctors think about pregnant women asking about the gender of their baby?

Here are the results of a survey of obstetricians and gynecologists.

[Doctors' honest opinions survey results]

• 75%: “I think it’s a natural question.”

• 20%: "I want to answer to the best of my ability."

• 3%: "Not medically significant"

• 2%: "I don't really want to hear it."

Surprisingly, many doctors consider gender questions to be "natural."

Here are some comments from doctors:

"It's natural for pregnant women to want to know the gender of their baby.

However, health checks are a top priority.

The reality is that it's difficult to spend too much time on sex determination."

"I want to tell you after I know for sure,

I often don't say anything at the "maybe" stage.

I'm sorry for giving you the wrong information."

"For pregnant women who listen carefully,

I want to answer as many questions as possible."

The best time to ask about the gender

To ask about gender,

When is the best time?

[Optimal timing]

• Check-up around 14 weeks pregnant (for boys)

• Check-up at around 17 weeks of pregnancy (for girls)

• At the beginning or end of the ultrasound examination

• When the doctor is relaxed

On the other hand, there are times when it is best to avoid it.

[Timing to avoid]

• When a doctor is checking for any abnormalities

• When the health checkup is crowded and busy

• First prenatal checkup (first trimester)

• When an examination is highly urgent

Observing the doctor's situation and asking questions at the appropriate time is

That's the trick to getting a good answer.

👉Let 's take a closer look at the reasons and solutions when you don't know the gender

💡 Learn about gender determination with NIPT testing

7 reasons why you don't know your baby's gender

Complete measures for twins, breech births, and umbilical cord births

"I couldn't figure it out this time either" - A thorough explanation of the reason

As the pregnancy progresses,

Every time I have a checkup, I'm told, "We still don't know this time either."

At times like that, I get anxious,

Do you ever worry that something is wrong with your baby?

But don't worry.

The fact that you don't know the gender

It has absolutely nothing to do with the health of the baby.

Here are seven reasons why gender determination can be difficult,

We will explain each measure in detail.

Reason 1: Baby is shy and keeps his legs closed

This is the most common reason.

The baby has his legs tightly closed,

The external genitalia are not visible.

Why close your legs?

• Relaxed natural position on the stomach

• Trying to maintain a stable position in the amniotic fluid

• By chance, my legs were closed at the time of the ultrasound examination.

【countermeasure】

• Have your stomach gently shaken during the examination

• Change positions to turn your baby

• Wait until your next checkup (most likely)

Reason 2: The baby is breech and in a position that makes it difficult to see

In the case of breech presentation (pelvic presentation),

The external genitalia may be at an angle that makes it difficult to see with an ultrasound.

[Reasons why it is difficult to determine if the baby is breech]

• Baby's head is down and bottom is up

• External genitalia tend to be hidden deep inside the mother's body

• Echo angle is limited

【countermeasure】

• Confirmation with 3D and 4D ultrasound

• Recheck after breech position has been corrected

• Wait until the third trimester

Reason 3: The umbilical cord gets in the way

The umbilical cord is in front of the external genitalia,

This makes it difficult to determine the gender.

[Situations where the umbilical cord gets in the way]

• The umbilical cord is tangled between the legs

• The umbilical cord is directly in front of the external genitalia

• Images are difficult to see due to blood flow in the umbilical cord

【countermeasure】

• Wait for the baby to move.

• Change the angle and aim the echo

• Check again later

Reason 4: Too little amniotic fluid (oligohydramnios)

If the amount of amniotic fluid is low,

The echo image will be blurred and difficult to see.

[Effects of oligohydramnios]

• Ultrasound becomes difficult to pass through

• The image is not clear.

• Restricted baby's movement

【countermeasure】

• Increase fluid intake (under medical supervision)

• Rest to improve amniotic fluid volume

• Re-examination using high-performance ultrasound equipment

Reason 5: Twins make it difficult to confirm

In the case of twins,

Their bodies may overlap, making it difficult to determine their gender.

[Why it is difficult to judge twins]

• One baby is hiding the other

• There is little space inside the uterus

• Difficult to distinguish which is which

【countermeasure】

• Detailed observation over time

• Use of 3D and 4D ultrasound

• Confirmed through multiple tests

Reason 6: You're still too early in your pregnancy

When the external genitalia are not fully developed,

Gender determination is difficult.

[Limitations of early diagnosis]

• Before 12 weeks of pregnancy: Almost impossible to determine

• 13-15 weeks pregnant: Uncertain about a boy

• Before 16 weeks of pregnancy: Girls are especially vulnerable

【countermeasure】

• Wait until the right time

• Patiently watch your baby grow

• Confirmation after 20 weeks of pregnancy

Reason 7: The performance of the ultrasound equipment and the experience of the technician

The performance of the echo equipment used,

The experience of the technician performing the test also affects the accuracy of the results.

[Technical factors]

• Image quality limitations with older echo devices

• Experience of laboratory technicians in gender determination

• Time constraints on inspection

【countermeasure】

• Testing in a clinic with high-performance equipment

• Consult a doctor experienced in gender determination

• Consider getting a second opinion

How to keep your mind when you don't understand

If you don't know the gender,

You can't help but feel anxious or impatient.

But why not try thinking about it this way?

[Positive thinking]

• Evidence that the baby is moving well

• A surprise awaits you at birth.

• Kill two birds with one stone by preparing both men and women

• Respects the baby's pace

Even if you don't know the gender,

The baby is definitely growing.

Don't rush,

You can also wait for the baby's timing.

Maybe it's one of love.

👉 Learn how to reliably determine gender with NIPT testing

💡Learn more about gender misidentification

Gender determination using NIPT and amniocentesis

A complete guide to early diagnosis with 99.9% accuracy

Are there any tests other than ultrasound that can determine the gender?

"Although ultrasound can't tell you the gender,

Is there any other way to know for sure?"

I'm sure many of you have questions like this.

In fact, in addition to the ultrasound examination,

There are tests that can determine gender with over 99.9% accuracy.

Here we will explain about NIPT (new type prenatal testing) and gender determination using amniocentesis.

I will explain in detail.

Gender determination using NIPT (new type prenatal testing)

NIPT is a test that examines the fetus's chromosomes using the mother's blood.

[Features of NIPT]

• Testing is possible from the 10th week of pregnancy

• Maternal blood test only (non-invasive)

• Gender determination accuracy: 99.9% or more

• Can be determined approximately 4-7 weeks earlier than ultrasound

[Inspection system]

Analyzing the fetal DNA contained in the mother's blood

Check for the presence of a Y chromosome.

If there is a Y chromosome, it is determined to be a boy, and if there is no Y chromosome, it is determined to be a girl.

【merit】

• Extremely high accuracy

• Early detection is possible

• No burden on the mother or fetus

• Chromosomal abnormalities can also be checked at the same time.

[Disadvantages and points to note]

• Not covered by insurance (cost: approximately 100,000-200,000 yen)

• Gender-specific testing is not common

• Not all medical institutions offer this service

• Counseling may be needed

Gender determination by amniocentesis

Amniocentesis involves collecting the amniotic fluid that surrounds the fetus,

A test that examines chromosomes and genes.

[Characteristics of amniocentesis]

• Performed around 15-18 weeks of pregnancy

• Gender determination accuracy: Nearly 100%

• It is also possible to confirm the diagnosis of chromosomal abnormalities.

• Invasive tests (needle insertion)

[Testing method]

A thin needle is inserted into the abdomen to collect amniotic fluid.

The fetal cells contained within are analyzed.

【merit】

• Most reliable gender determination

• It is also possible to definitively diagnose genetic diseases.

• Highly reliable results

[Disadvantages and risks]

• Risk of miscarriage (approximately 0.1-0.3%)

• Pain or discomfort

• High cost (around 100,000-150,000 yen)

• Not recommended unless medically indicated

Chorionic villus sampling for sex determination

Chorionic villus sampling is a test that involves sampling chorionic villi, which are part of the placenta.

[Characteristics of chorionic villus sampling]

• Performed around 10-13 weeks of pregnancy

• Gender determination accuracy: Nearly 100%

• Can be performed earlier than amniocentesis

• Invasive testing

[Testing method]

A needle is inserted through the abdomen or a catheter is inserted through the vagina.

Chorionic villus tissue is collected.

[Risks and precautions]

• Risk of miscarriage (approximately 0.2-0.5%)

• Risk of bleeding and infection

• Sex determination alone is not usually performed

Should I get these tests?

"I want to take these tests because I want to know the gender for sure."

Some people may think this.

But I have to tell you something important.

[Important Note]

• Testing solely for sex determination is not recommended.

• Performed when medically indicated (risk of chromosomal abnormalities, etc.)

• Adequate counseling is required

• An ultrasound examination is often sufficient.

These tests are essentially

It is used to check the health of the fetus.

Gender determination is obtained as "secondary information,"

This test is not just for finding out the gender.

What if I really want to know the gender as soon as possible?

If you still want to know the gender as soon as possible,

Consider the following options:

[Realistic options]

• Examination at a clinic with high-performance ultrasound equipment

• Detailed observation with 3D and 4D ultrasound

• Consult a doctor experienced in gender determination

• Use of facilities that support baby nub detection

[Points to consider when consulting with a doctor]

• Be honest about why you want to know the gender.

• Fully understand the risks and costs of testing

• Check for medical indications

• Consider other options

eventually,

It is important to consult with your doctor before making a decision.

It is important to know the gender

The safety of the mother and fetus is the top priority.

Please don't forget.

👉Learn about gender misidentification with real-life stories

💡Let 's examine pregnancy superstitions

[True story] Gender determination was wrong!

Learn the truth through probability, causes, and personal experiences

"They said it was a boy, but it turned out to be a girl"

Even though I was constantly told at the hospital that it was a boy,

When she gave birth, it turned out to be a girl...

It's actually not uncommon for people to have had such an experience.

Even with modern medical technology,

The reality is that gender determination is not 100% accurate.

Here, we will discuss the mistakes in gender determination.

We will explain in detail, including the actual probability, causes, and personal experiences.

Probability of errors in gender determination - Actual data

The accuracy of gender determination using current ultrasound technology is

Just how much is it?

[Error probability by week number]

• Before 15 weeks of pregnancy: about 10-20% error

• 16-19 weeks pregnant: about 3-8% error

• After 20 weeks of pregnancy: about 1-3% error

• After 28 weeks of pregnancy: about 0.5-1% error

[Mistake trends by gender]

• "Boy → Girl": About 60% (the majority of mistakes)

• "Girl → Boy": Approximately 40%

Surprisingly,

There are more mistakes when it comes to determining that the baby is a boy.

There is a clear reason for this.

Why are there so many mistakes made between "boy" and "girl"?

[Major causes]

1. Misidentifying the umbilical cord

The umbilical cord is between the legs,

Cases where it looks like a male organ.

This is the most common cause of error.

2. Misidentifying hands and feet

The baby's hands and feet are near the external genitalia,

Cases where it is mistaken for a protrusion.

3. Shadows and Artifacts

Due to technical issues with the ultrasound image,

A case where a shadow that does not actually exist appears to be a protrusion.

4. Misidentifying a girl's clitoris

The girl's clitoris is swollen,

Depending on the angle, it may look like a male organ.

Actual experiences: Voices of moms who have made mistakes

[Testimonial 1: Mr. A (32 years old)]

"From the 16th week of pregnancy, I was consistently told it was a boy.

I thought up a name, bought lots of blue clothes,

The whole family was preparing to welcome a baby boy.

But at the moment of birth, the doctor told me, "It's a girl!"

At first, I couldn't believe my ears.

Thinking about it now, even during the ultrasound in the later stages of pregnancy,

"It's a little hard to see, but it's probably a boy"

I was concerned about the many vague expressions.

But the moment I saw my newborn daughter,

Gender doesn't matter anymore.

Now I think of it as a surprise gift."

[Testimonial 2: Mr. B (28 years old)]

"At my 20-week checkup, I was diagnosed with a girl.

But somehow I'm not sure,

When I went to another hospital, I was told it was a boy, which confused me.

In the end, the gender remained unclear until the birth.

The baby was a boy.

I later heard that,

Apparently the umbilical cord was tangled and difficult to see.

I was worried during the period when I didn't know the gender,

Thanks to this, both men and women are ready.

Maybe it turned out to be a good thing in the end."

What doctors do to reduce errors

To prevent mistakes in gender determination, obstetricians and gynecologists

We have come up with various ideas.

[How to check with a doctor]

• Check multiple times from multiple angles

• Record video and review later

• Double check with other doctors

• If you are unsure, be honest and say, "I don't know."

• Recheck in the third trimester

[Consideration for how to communicate]

• Use expressions like "maybe" and "probably"

• Make it clear that it is not 100%

• When in doubt, refrain from judgment

Be prepared when mistakes happen

If there is an error in the gender determination,

How should we take this?

[Important mindset]

1. Understand that the echo diagnosis is a "prediction"

Even with current technology, it is difficult to make a 100% accurate judgment.

Please understand that predictions may not always be accurate.

2. You can always review your preparations.

You can change baby items and names after the baby is born.

Nowadays, there are many items that can be used regardless of gender.

3. The biggest surprise gift

It's not "different from my expectations,"

Think of it as receiving a special surprise.

4. Your baby's health comes first

More important than gender is that the baby be born healthy.

What pregnant women can do to prevent mistakes

[Possible measures]

• Understand the accuracy of sex determination beforehand

• Request multiple confirmations

• If you are unsure, seek a second opinion.

• Accept it as "high probability" rather than "absolute."

[Mental preparation]

• Accept the possibility of mistakes.

• Have the ability to love both men and women

• Prioritize health over sex

• Waiting for the birth as a “look forward to”

Misjudgments in sex determination are not uncommon.

What's important is that no matter what gender the baby is,

Be prepared to love with all your heart.

Surely, the moment you were born,

Gender doesn't matter anymore

You're sure to meet your adorable child.

👉Let 's examine the science behind pregnancy superstitions

💡Let 's think about how we approach gender

Pregnancy superstitions thoroughly investigated

Can you predict the gender of your baby based on the shape of your belly, fetal movements, and morning sickness?

Is it true that if your belly sticks out, it's a boy?

During pregnancy, people around me

"Looking at the shape of your belly, it's a boy."

"Your morning sickness is mild, so it's a girl."

Have you ever been told something like this?

In Japan, since ancient times,

Guessing the gender from the shape of the belly and the appearance of the pregnant woman

There are various jinxes.

But do these superstitions really come true?

Is there any scientific basis for this?

Here, we will thoroughly examine each of the popular pregnancy superstitions.

Belly Shape Jinx: Does it stick out or spread out?

[Frequently-said jinxes]

• A pointed belly → Boy

• Belly expands to the sides → Girl

• Lower belly → Boy

• A protruding belly → Girl