Title: Fetal Development: From Insemination to Birth - Pregnancy Center - Everyday Health
Headings: 
What's Going On in There During Pregnancy?
Insemination – the First Step in Pregnancy
Implantation of the Fertilized Egg
The Timeline of Pregnancy
5 Weeks Into Pregnancy: Fetal Development
8 Weeks Into Pregnancy: Fetal Development
12 Weeks Into Pregnancy: Fetal Development
16 Weeks Into Pregnancy: Fetal Development
20 Weeks Into Pregnancy: Fetal Development
24 Weeks Into Pregnancy: Fetal Development
32 Weeks Into Pregnancy: Fetal Development
36 Weeks Into Pregnancy: Fetal Development
37 Weeks to Childbirth
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Content: 16 Weeks Into Pregnancy: Fetal Development
At 16 weeks you can almost see through the fetal skin, and a very fine growth of hair called lanugo is forming on the head. Muscles and bones are coming together to form the skeletal system. The fetus starts to move and make sucking motions with its mouth. The liver and pancreas have formed, and the intestines have started to make the first bowel movement, called the meconium. 20 Weeks Into Pregnancy: Fetal Development
By 20 weeks, the fetus is making itself known. What the mother felt as a slight fluttering at 18 weeks is now regular movement. The fetus can actually hear noises outside the womb. The heartbeat is loud enough to be heard with a stethoscope.