Your Baby's Development
Your baby continues to be active, and those first few flutters of movement have given way to hard jabs and punches that may take your breath away. If you notice a decrease in movement, do a fetal kick count: your baby should move at least 10 times in an hour. If your baby moves less, talk to your health care provider.

The baby's adrenal glands have begun to produce hormones such as androgen and estrogen. These hormones stimulate the hormone prolactin in the mother's body, causing her to make colostrum, the milk that will feed the baby in the first few days if she chooses to breast-feed.

Your Body
During pregnancy, iron is important for replenishing the red blood cell supply, accommodating the demand created by increased blood volume, and providing the baby with adequate iron stores for the months after birth. You should be eating at least 30 milligrams of iron each day during the second and third trimesters. Because iron deficiency is common during pregnancy, your health care provider may recommend that you receive a blood test to check your iron level. If your iron levels are found to be low, you may be prescribed an iron supplement.