Hi! All 3 are the same .Don t overload on supplements. More isn t better when it comes to vitamins — so stay with the recommended dosage and don t take other extra supplements unless your doctor recommends it. Check in with your practitioner as well if you re taking herbal supplements, as some herbs can be harmful when you re trying to conceive. . Look for a vitamin that has at least 400 mcg of folic acid (aka folate or vitamin B9). Taking adequate amounts of this most important nutrient both before and in the early stages of pregnancy significantly reduces the chances your baby will develop a neural-tube defect such as spina bifida. Calcium is another crucial nutrient for women whether you re trying to get pregnant or not; but it s especially important when you re growing another set of bones (your baby s). If you re not taking in enough from milk, yogurt, or other calcium-rich foods — you need 1,000 mg (milligrams) a day — make sure it s in your vitamin. Iron is an important mineral, and most prenatals will have 30 to 40 mg. If you re anemic, talk to your doctor about whether you ll need more. And don t forget to look for other important nutrients like zinc and manganese (for fertility), iodine (for your baby-to-be s thyroid and brain development), and vitamin B6 (to decrease the potential for morning sickness). If you re eating vegetarian or vegan during pregnancy, make sure you re extra diligent about getting the right nutrients in your supplements.