When Do You Find Out The Gender Of Twins

So, you’re expecting twins—congratulations! That means double the joy, double the laundry, and probably double the number of people asking, “Are they identical?” But the big question on everyone’s mind is: when do you find out the gender of twins?

Spoiler alert: it’s not exactly like a singleton pregnancy. But don’t worry, the answer is still exciting—and usually comes with a side of ultrasound gel.

The Short (and Sweet) Answer

You can typically find out the gender of twins around 18 to 22 weeks of pregnancy. That’s the same window as for singletons, but with a twist.

Why the wait? Because the anatomy scan (or “20-week scan”) is when the ultrasound tech gets a good look at all the baby bits. For twins, they have to check two sets of parts—and sometimes one baby decides to play hide-and-seek.

So, if your little one is curled up like a shrimp or facing the wrong way, you might need a repeat visit. Patience, grasshopper.

But Wait—There’s a Chorionic Twist!

Here’s where the twin thing gets extra nerdy (and fun!). If your twins are fraternal (dizygotic), you can learn the sex as early as 9 to 10 weeks with a simple blood test called NIPT (Non-Invasive Prenatal Testing).

This test looks for tiny pieces of baby DNA floating in your blood. For fraternal twins, it’s pretty accurate—though it can’t always tell if both are the same gender. You might get a “suspected boy and girl” result, which is basically the universe saying, “Good luck guessing!”

Twin Pregnancy Ultrasound: Identical, Fraternal & Hidden

For identical twins (monozygotic), the NIPT is still useful, but it can trip up if the babies share DNA. In that case, it might say “boy” even if one is a girl—which is rare, but possible. Trust the ultrasound for the final word.

What About the “Old-Fashioned” Ultrasound?

Ah, the good ol’ belly jelly. At 18-22 weeks, the ultrasound tech will look for the “turtle” or the “hamburger” (yes, those are real medical terms… sort of). For twins, they have to tag each baby like a superhero— Baby A and Baby B—to avoid mix-ups.

But here’s the kicker: twins are often in weird positions. One might be breech (head up), the other transverse (sideways). They’re basically roommates arguing over the thermostat. So, the tech might say, “One is definitely a boy, and… the other is… well, it’s a 50/50 guess!”

My advice? Don’t buy pink or blue onesies until you have a clear confirmation—unless you love surprises. Or mismatched wardrobes.

Can You Find Out Even Earlier?

Technically, yes—if you’re doing IVF. With IVF, the embryos are tested for gender before they’re even transferred. So you could know at 5 weeks (when the pregnancy is confirmed) if the doctor tells you, “You’re having two XYs” or “two XXs.”

Twin Baby Boy And Girl Ultrasound 3 BOYS 🩵🩵🩵 In 2 Ultrasounds

But for natural conceptions? The earliest you can get a hint is with a sneak peek blood test at home, which claims to work at 9 weeks. Just remember: those kits can give false results for twins because the DNA gets muddled. So, take the “team blue” result with a grain of salt (and maybe a laugh).

Oh, and don’t try the baking soda trick from the internet. Trust me, it just makes a mess—and your husband will ask why you’re doing science experiments in the kitchen.

What If One Twin Just Refuses to Reveal?

This happens. One baby might be modest, or literally hiding behind the placenta. In that case, you might have to wait until your third trimester—around 28-30 weeks—for a follow-up scan. By then, they’re bigger and harder to miss.

Or, you could wait until birth! That’s a double surprise—imagine the drama! You’ll be the talk of the hospital nursery. “She had TWINS and didn’t know the genders? Legendary.”

Either way, you’ll have two tiny humans to love, regardless of their chromosome lineup.

How early can I know the gender of twins? - Dad's Guide to Twins

A Quick Cheat Sheet for Twin Gender Timing

Let’s wrap it up with a little list (because who doesn’t love a list?):

NIPT blood test: 10-12 weeks (good for fraternal, ok for identical).
Anatomy scan: 18-22 weeks (most reliable, but twins are tricky).
Late scan: 28-30 weeks (if one baby is a show-off).
Birth: Anytime after 32 weeks? (Nature’s surprise party).

The Uplifting Conclusion (You Knew It Was Coming)

So, when do you find out the gender of twins? The real answer is: whenever they decide to cooperate—which is a lot like life, isn’t it? You plan, you wait, and sometimes the universe says, “Not yet, let’s make it more interesting.”

But here’s the beautiful truth: whether you find out at 10 weeks, 20 weeks, or at the moment they take their first squalling breath, the gender doesn’t define the adventure. What defines it is the double cuddles, the double giggles, and the double shock of how much laundry two tiny people can generate.

So, take a deep breath, eat a pickle (or whatever you’re craving), and remember: finding out the gender is just the pink or blue icing on an already wonderful cake. You’re getting two sneaky, wiggly, amazing humans—and that’s a story you’ll tell for a lifetime. Now go book that ultrasound, and may your babies cooperate (or at least give you a chuckle).