Week 20

Your baby weighs about 10 1/2 ounces now. She's also around 6 1/2 inches long from head to bottom, and about 10 inches from head to heel — the length of a banana (For the first 20 weeks, we use measurements taken from the top of the baby's head to her bottom — known as the "crown to rump" measurement. After that, we use measurements from head to toe. This is because a baby's legs are curled up against her torso during the first half of pregnancy and are very hard to measure). A greasy white substance called vernix caseosa coats her entire body to protect her skin during its long submersion in amniotic fluid. Your baby is swallowing more, which is good practice for her digestive system.

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