Vitamin D is a fat-soluble steroid that can be manufactured by the body when exposed to direct sunlight. Vitamin D is very important for pregnant health and fetal development. Vitamin D maintains the balance of minerals in the body, maintains the health of the mother's bones and helps build the baby's bones. , And has a role in supporting the immune system (Immune function) and has a role in the process of cell growth and natural division, helps vitamin D regulate the levels of calcium and phosphorus in the body, and the pregnant woman these elements as well as the fetus to maintain the health of bones and teeth, Vitamin D has a role in infection control and disease prevention Diabetes and some cancers.