Vitamin D has been widely noticed and recognized as an important factor in reducing the risk of many chronic diseases in the recent years. Literature suggests that vitamin D deficiency may affect the embryo quality and pregnancy rate.
Anytime.
Blood test (fasting not required)
For infertile females deficient in vitamin D, it is advised to supplement 2000 IU of vitamin D per day. The level of vitamin D may increase to the normal range after one month.