VasectomyVasectomy is a permanent male birth control measure and a means of contraception used in many parts of the world.
Cognitive DevelopmentDuring adolescence, the developing teenager acquires the ability to think systematically about all logical relationships within a problem.
Relationship DevelopmentAdolescent attention often shifts to a more intense focus on social interactions and friendships expanding from same sex friends to same sex groups of friends to heterosexual groups of friends.
Male Factor InfertilityProblems with the production and maturation of sperm are the most common causes of male infertility.