Some substances interfere with the body's absorption of calcium. Salt, protein foods, tea, coffee and unleavened bread should not be consumed with calcium-containing foods. Research has also found that zinc can be helpful to a thin or underweight woman during pregnancy. We believe this mineral helps a thin woman increase her chances of giving birth to a bigger, healthier baby. The value of fluoride and fluoride supplementation in a pregnant woman is unclear.
Some prenatal vitamins contain fluoride.
Fluoride supplementation in a pregnant woman has not been proved to harm her baby. A folic-acid deficiency can result in anemia. Additional folic acid may be necessary with multiple fetuses or if the mother suffers from Crohn's disease or alcoholism. This is suggested for all pregnant women, especially those who have previously given birth to a baby with spina bifida. Prenatal Vitamins Prenatal vitamins are usually prescribed for a pregnant woman by her doctor.