Fetal Development Timeline


12 Weeks 
By this week, your baby is approximately two-and-a-half inches long. Several important digestive functions begin around this week. The pancreas begins to produce insulin, a hormone that regulates blood sugar levels. The liver starts to secrete bile, a thick greenish fluid stored in the gall bladder that helps the body digest fats. The bridge of the nose and the jawbones are starting to create the familiar outlines of a human face. Inside the mouth, folded tissues come together to make the palate, or roof of the mouth. Fingernails start to emerge from their nail beds.


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