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Your Developing Baby, Week by Week

Your baby begins as a tiny cluster of cells, but during the nine-month process of pregnancy she becomes an amazing baby with facial features, a beating heart and kicking legs. Find out what's happening with baby's development week by week.
week 31 Week 31

Your baby is gaining more weight than height at this point. Because she's too big to stretch out, she's now forced into the fetal position, which she'll stay in until birth. This this week also boasts some exciting reproductive developments. Having a boy? His testicles are moving through the groin on their way into the scrotum. And if you've got a girl in there, her clitoris is already relatively formed.