Week 21

My Baby's Development

The amniotic fluid that has supported and cushioned your baby in the uterus now serves another purpose. The intestines have developed enough. Small amounts of sugars can be absorbed from the fluid that is swallowed and passed through the digestive system to the large bowel. Almost all of your baby's nourishment comes from you through the placenta.

Until now your baby's liver and spleen have responsibility to produce blood cells. The bone marrow spaces are developed enough to contribute to blood cell formation as well. The bone marrow will become the major site for blood cell production in the third trimester and after birth. (The spleen will stop to produce blood cells by week 30 and the liver will stop for a few weeks before birth.)

My Body

Exercise may keep you to stay in shape during your pregnancy and can even keep some symptoms (such as varicose veins, excessive weight gain and backache) to a minimum. Since the ligaments become more relaxed during pregnancy, you're at higher risk for injury. So, low-impact or non-impact exercises (such as swimming, walking and yoga) are your best bets. Consult your health care provider before beginning any exercise program while you're pregnant.