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Vitamin D Level and Infertility

It has been known for centuries that the human body needs many vitamins. Vitamin D is known as a steroid hormone produced mainly by ultraviolet B. Only about 10-20% of this vitamin can be taken by diet. Some genetic and environmental factors can cause this vitamin deficiency. These include high latitude living, traditional outdoor clothing, dark skin color, old age, inadequate vitamin D intake by diet, parenchymal diseases of kidney and liver, genetic defects preventing vitamin D synthesis and function, drugs and sunscreen use (1,2).