Effects of Vitamin D on Apoptosis and Quality of Sperm in Asthenozoospermia.

Objective: Vitamin D receptor (VDR) is expressed in human spermatozoa. However, the role of vitamin D (VD) in human male reproduction has not yet been clarified. In this study, effects of VD on sperm parameters and its apoptosis in asthenozoospermic and healthy men were evaluated.