This multivitamin multimineral supplement provides some of the key nutrients you and your developing baby may need during pregnancy and lactation. It is a good source of Calcium. Calcium is one of the most important minerals in your body. This supplement is also an excellent source of Vitamin D which assists in the absorption of Calcium. In addition, to these key nutrients, this supplement contains Iron, a vital component of hemoglobin that plays a key role in energy metabolism.