Try vitamin B 6 . Investigate alternative remedies. If you can't keep anything down for a full day, call your doctor or midwife. For newly pregnant women it's not calories but nutrients that matter. Folic acid, a B vitamin, helps prevent neural tube defects and reduces the chances of a preterm delivery.
Iron contributes to the production of red blood cells that carry oxygen in the blood.
And calcium builds fetal teeth and bones without compromising your calcium stores. So yes, prenatal vitamins are well worth taking. It's best to heed your doctor's recommendations about nutritional supplements, though, because certain nutrients, such as vitamin A, can cause birth defects when taken in excessive amounts. Furthermore, strengthening your back and abdominal muscles helps guard against the back pain that often strikes as your belly grows. And some studies show that women who exercise during pregnancy have easier, shorter labors.