By the time you are 20 weeks pregnant, your baby is starting to grow hair on his or her head! Other fetal development that typically takes place around week 20 of pregnancy includes the following:
A protective, waxy skin covering (called vernix caseosa) is forming to protect the baby's skin from the amniotic fluid
Delicate eyebrows are forming
If your baby is a girl, her uterus is starting to develop
Your baby's skin is thickening and developing layers, including the dermis, epidermis, and subcutaneous layer
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