If prescribed at this time, they can worsen symptoms of nausea and vomiting. If you experience leg cramps during pregnancy, don't stand for long periods, and rest on your side as often as possible. The iron content of prenatal vitamins can irritate your stomach. Iron supplements may also cause constipation. You may not be able to take iron supplements until after the first trimester.
Some doctors prescribe calcium supplementation.
Calcium is important for every pregnant woman. It helps build strong bones and teeth in the baby and helps keep the woman's bones healthy. During pregnancy, you need 1200 to 1500mg a day. That's about 3 to 4 glasses of skim milk a day. Calcium supplementation may help control blood pressure.