Pregnancy and Fetal Development

This photo shows a baby at 16 weeks of gestation during the second trimester of pregnancy. At this stage:

• Tissues including bones and muscles continue to form.
• The baby begins to develop translucent skin.
• The baby begins to form a substance called meconium, which is the first bowel movement.
• The baby displays a sucking reflex with the mouth.
• The baby weighs approximately 3 ounces and is between 4 to 5 inches in length at this time.