Why genetic testing can’t always reveal the sex of a baby | Live Science


Gender reveal parties are best known as celebrations involving pink and blue, cake and confetti, and the occasional wildfire. Along with being social media hits, gender reveals are a testament to how society is squeezing children into one of two predetermined gender boxes before they are even born.

These parties are often based on the 18- to 20-week ultrasound, otherwise known as the anatomy scan. This is the point during fetal development when the genitals are typically observed and the word “boy” or “girl” can be secretly written on a piece of paper and placed into an envelope for the planned reveal.

Now there is a new player in the gender reveal game: genetic screening.

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