Calcium homeostasis and bone density are 2 important
functions of Vitamin D in human beings. To mediate its biologic
functions, it utilizes Vitamin D receptors, that are present mostly in
calcium regulating tissues like the bone and parathyroid glands .
Still finding Vitamin D receptors within the reproductive tissues like
the ovary, endometrium, testis. Hypothalamus along with pituitary
has stimulated the study of Vitamin D’s role in human reproduction