How a Baby’s XX Gender or XY Gender is Determined Females have an XX pair of sex chromosomes, and males, an XY pair. A baby’s gender is determined by the sperm cell that fertilizes a woman’s egg. Sperm carries one sex chromosome, either a Y (male) or X (female).
The gestational sac can be seen at the earliest of four and a half weeks and the recommended time to wait for getting an ultrasound done is at least six weeks. It is very much normal for the parents to want to know the sex of their baby before the birth. Thus, we have listed 7 ways to tell your baby’s gender from an early sonogram:
Although plenty of methods — some legitimate, some just fun — can predict the sex of your baby earlier on, your 20-week ultrasound usually offers a fairly reliable answer — with a few caveats. Learn how this second trimester sonogram works and how to tell if the images you see indicate that a baby boy or girl is on the way.