For example, One A Day ® Women's Prenatal Advanced contains 110 mg of Choline, whereas One A Day ® Prenatal 1 and One A Day ® Prenatal Gummies do not contain Choline. Additionally, both One A Day ® Prenatal Advanced and One A Day ® Prenatal 1 contain iron, whereas the gummy does not contain iron.

One A Day Women's Prenatal multivitamins are the #1 OB/GYN recommended over the counter brand of Prenatal multivitamins. One A Day Multivitamins can provide nutritional support that you and your growing family may need at every life stage.

This combination product also contains iron and folic acid. Women of childbearing age should maintain adequate levels of folic acid either through diet or supplements to prevent infant spinal cord defects in the developing baby.

Our Top Prenatal Vitamins

• Best For Brain Support: One A Day Women's Prenatal Advanced Complete Multivitamin With Brain Support.
• Best Value: Nature Made Prenatal Multi + DHA.
• Best For Simplicity: One A Day Women's Prenatal 1 Multivitamin.
• Best Anti-Nausea: Perelel 1st Trimester Prenatal Pack.

One a Day Women's Prenatal contains a generous 800 micrograms of B vitamin, folic acid – one of the most important vitamins for fetal brain and spinal cord development. Supports bone health with calcium and vitamin D.

These types of supplements have different amounts and types of vitamins, minerals and other additives such as omega-3 fatty acids. But the main difference between a prenatal vitamin and a multivitamin is the amount of folic acid and the amount of iron.

Women who are pregnant or trying to conceive should take a prenatal every day. However, if a prenatal dose is missed, women should not double up on dosage or take more than one prenatal multivitamin a day.

Answer From Katherine Zeratsky, R.D., L.D. There is no reason to take prenatal dietary supplements if you are not pregnant and are not trying to get pregnant. Some people take prenatal supplements because of unproven claims that they give you thicker hair and stronger nails.

Prenatal vitamins are supplements that contain daily vitamins and minerals you need before and during your pregnancy. Folic acid is the most important vitamin to take when planning a pregnancy. Folic acid is a B vitamin that cells in your body need for growing and developing.

Like other dietary supplements in the United States, over-the-counter prenatal vitamins are not regulated like drugs and do not require F.D.A.

Prenatal supplements and women's multivitamins may contain some of the same general vitamins and minerals, like vitamin C, B vitamins and zinc. But prenatals may contain other nutrients that experts recommend for women who are pregnant or planning for pregnancy, like folic acid, iodine and DHA.

They're geared to make up the common nutritional deficiencies a pregnant woman could have. But they aren't really intended for women (or men) who aren't expecting or lactating. Taking too much folic acid each day can have the adverse side effect of masking a vitamin B-12 deficiency. Excess iron can be a problem, too.