How Early Can You Find Out Your Baby's Gender with Ultrasound?

For centuries, expectant parents had to wait until the moment of birth to learn the sex of their babies. Of course there have always been old wives’ tales and superstitions about figuring out baby gender – but thanks to the wonders of modern technology, moms and dads these days are able to find out a baby’s gender with ultrasound months before delivery. This is most commonly done between the 18th and 26th weeks of the pregnancy, but some newer ultrasound technology can determine the baby’s gender as early as 12 or 13 weeks.

Finding Out Your Baby’s Gender with Ultrasound

Ultrasounds don’t just reveal the baby’s gender; the procedure is done mainly to take an early look at the fetus to make sure it’s developing properly. During an ultrasound, the technician moves a device over the mother’s stomach that sends high-frequency sound waves through her uterus. The sound waves create a picture of the fetus that is viewed simultaneously on a monitor. Depending on the age and position of the fetus, the technician should be able to accurately tell if it’s a boy or a girl. This is based on the technician’s recognition of its male or female genitals. Before 18 weeks of gestation, male and female sex organs can appear similar, which is why most ultrasounds are performed after this point of fetal development. No obvious evidence of a penis may lead to the assumption that the baby is a girl, but this is not 100% proof, so if you’re having an ultrasound to find out the gender of your baby, be sure to ask the technician how clearly he or she can see the baby’s genitals on the monitor. Other medical procedures performed on some pregnant women can also determine the baby’s gender, such as amniocentesis, which is recommended for women who become pregnant at a later age or might be at risk for genetic diseases or birth defects, and chorionic villus sampling (CVS), a test on pregnancies that are at high risk for genetic or chromosomal defects. If you’re having an ultrasound but don’t want to find out the baby’s gender, you can still look at the image; it’s unlikely that you’ll be able to recognize a developing baby’s genital organs without the help of a trained professional to point them out.

Should You Find out Your Baby’s Gender with Ultrasound?

Having ultrasound to find out your baby’s gender is a fairly straightforward and safe procedure, and many expectant parents want to know this before the baby is born.  That way, they can settle on a name for the baby and start decorating the nursery for either a girl or a boy. Baby shower gift choices are also simpler this way. Some people feel this might also strengthen the bond with the baby, who now has a specific identity. At the same time, there are couples who want to wait and choose not to find out the baby’s gender until the moment of birth. They want the discovery of whether the baby is a boy or a girl to be a surprise. The suspense can make pregnancy, labor and delivery more exciting. The nursery can be decorated in neutral colors, and there’s plenty of time once the baby has arrived to buy gender-specific clothing. In these cases, if ultrasound or other procedures which can determine the baby’s gender are performed during the pregnancy, those results aren’t shared with the parents-to-be – but sometimes just knowing that someone else knows their baby’s gender is enough to convince parents to find out for themselves!

Average: 3.8 (306 votes)


By BabyWanted on 08/23/12 at 11:18 am

I'm fourteen and pregnant, but I want my babies gender to be a surprise. So at my ultrasound, I'm going to ask not to know the babies gender, unless I c  ...

By J9 on 09/02/11 at 9:56 am

I really wanted to memorialize the way that we announced the sex of our baby. I asked my husband to put together a short and creative video that we coul  ...

By MommyBaumann on 08/23/11 at 10:43 am

We were told at our NT Scan ((12wks, 3dys)that we're expecting a girl. Our 20 week u/s is in two weeks. Hope the tech was right! :)

4 comments so far » read more

Sign in to leave a comment!

Today on JustMommies

Baby Horoscopes

Curious about your baby's astrological sign? Want to know what your baby Aries or Leo might be like as a baby, check out JM's baby horoscopes.

Got Milk? (sponsored)

If you could visit yourself as a kid, what message would you bring? In this video from got milk?, a woman from the future advises herself as a little girl to start drinking milk for some absurdly entertaining results.


From the Message Boards

Baby Names


Thoughts? Does it feel popular? (it's #162 on the SSA list) Do you think it goes well with Blaise?...

Baby Names


Thoughts? I can't remember if I posted this name recently. How do you think it goes with Blaise?...

Pregnancy and Motherhood After Loss

9 months update

So little miss T is 9 months old (as of Friday)!!! She has her check-up next week so we'll find out...

Natural Childbirth

Standing or squatting delivery in hospital

i am hoping to do some type of natural squatting birth. But i have to do it in the hospital because...

Pregnancy and Motherhood After Loss

Care to share?

A recent pic of the LO's if you have one. Here are a few of Toren from this week. I love his face i...

» Check out the friendliest message board for moms and moms-to-be!