Usually gynae will prescribe prenatal vitamins for pregnant mummy other than folic acid, iron and calcium throughout the pregnancy period. These are specially formulated multivitamins that make up for any nutritional deficiencies in the mother's diet. While the supplements contain numerous vitamins and minerals, their folic acid, iron, and calcium content are especially important.
In fact there is various types of prenatal vitamins in the market now. Your gynae will know which type is best suit for your body. Therefore it is advisable to consult your doctor, don’t buy it over counter or any pharmacy.