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During pregnancy, many doctors are able to help parents with an ultrasound to determine the baby's gender, which is very exciting! Once you find out whether the baby will be a boy or a girl, you can throw a gender reveal party. It also gives you and your partner plenty of time to think of a name for your new child. However, it should be noted that the accuracy of the ultrasound really depends on how many weeks the woman has been pregnant. The longer means the easier it is to be sure of the baby's gender. It takes some expertise to read an ultrasound, so you’ll definitely want to have the technician or doctor give you the results. They can explain exactly what you’re looking at so you’ll be able to better understand what you're seeing.

Method 1
Method 1 of 2:

Asking the Technician or Doctor to Explain the Results

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  1. If you say you want to know the gender, the technician will be happy to tell you! However, you’ll need to make it clear that you don’t want to just know the results, you want to understand them.
    • You can say something like, “Can you show me exactly what indicates the gender? Can you explain to me how you can tell? I really appreciate it!”
  2. The gender tubercle is a body of tissue that indicates the formation of the genitals. This is commonly referred to as a “nub.” If the nub is angled upward, the gender is likely male. If the nub points straight out or down, it is more likely female. [1]
    • Sometimes the nub won’t be visible, and the technician won’t be able to see it. That doesn’t mean that anything is wrong. You'll just need to wait until your next ultrasound and hope that it will be visible then.
    • You probably won’t be able to identify the nub with an untrained eye. Ask the technician to point directly to the nub, and show you the angle.
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  3. Once you reach the 18-20 week ultrasound, it should be a lot easier to predict gender. The easiest way is to look for a penis. If you see one, there’s an excellent chance the gender is male. The absence of a penis indicates female. [2]
    • You might be able to identify a penis on your own, but it’s still a good idea to ask the technician if you’re looking at the right thing.
    • Keep in mind that sometimes another body part, like a finger, might be mistaken for a penis. The position of the fetus can sometimes make it difficult to tell for sure what is what.
    Heidi Murkoff, Pregnancy and Parenting Expert

    Ultrasounds open up a window into the womb for expecting parents. The main goal is checking the fetus's health, but they can also reveal the baby's sex. Gender is most clear on ultrasounds after 18 weeks when genitalia are more formed. However, the technology isn't foolproof — there's always potential for a delivery day surprise! Ultrasounds provide an exciting glimpse of the developing baby, though the view isn't always perfect.

  4. Advances in technology have greatly improved how accurately ultrasounds can show gender. If your technician uses 2D imaging, they might be able to visualize additional parts of genitalia. [3]
    • Ask the technician to point out the vulva, clitoris, and labia, if they think the gender is female.
    • Try to identify the scrotum and testicle of a male, with the help of the technician.
    • 3D and 4D ultrasounds provide a much clearer picture of the baby at 18-20 weeks. However, they are completely optional, as they do not actually make it easier to determine the gender.
    • Although ultrasounds are safe, you should only have them when necessary. Many people get 3D or 4D ultrasounds as a "keep sake", but many doctors advise that it's better to wait to snap photos after the birth. Also, insurance might not cover the expense. [4]
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Method 2
Method 2 of 2:

Managing Your Expectations

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  1. You can ask if it is possible to use the nub theory at the end of the first trimester. However, the ultrasound might not show the nub. You should also know that gender predictions at this point are much less accurate than they will be later in the pregnancy. [5]
    • Ultrasounds early in the pregnancy are generally to monitor the health of the baby and check for any issues. They’re not intended to be able to reveal the gender.
  2. The second or third trimester ultrasound can more accurately predict gender. When you go for your 18-20 week ultrasound, let the technician know that you would like to know the gender. Remember to ask them to show you exactly what they are looking at. [6]
  3. Ultrasounds at 18-20 weeks might be anywhere from 88-98% accurate. That’s pretty good (it's about 10% less earlier in the pregnancy), but there is still a margin of error. It might be tough, but you’ll have to wait for the actual birth to know for certain. [7]
    • The position of the fetus or just a simple error on the part of the technician can result in predicting the wrong gender.
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How Can You Tell If Your Baby Is a Boy Or a Girl?


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  • Question
    I really want a baby boy. Is there anything my husband and I can do?
    Community Answer
    See Raise the Chances of Having a Boy. Remember: there is still a chance of a girl even after using the suggestions in the article.
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      Tips

      • There are also some unproven methods that it won't hurt to ask the tech or doctor about. Some believe that 3 small white lines on the ultrasound in the shape of a triangle indicate a female.
      • If you don’t want to know the gender, make that clear, too!
      • You can also ask your doctor to help you learn to understand how to read ultrasounds.
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      Warnings

      • Follow the instructions prescribed by your physician. Do not hesitate to ask questions.
      • Check with your country's law before finding out your baby's gender. Some countries prohibit and even penalize for the same.
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