1 (of 10)
What's the leading cause of male infertility?
Weak swimming sperm
Low sperm count
Inability to ejaculate
Learn more about causes of male infertility.
Your Current Rank: Sperm. (0 correct answers)
You still have a lot to learn, but don‘t be discouraged. Just think, it takes the testes 72 days to fully form one sperm. With a little effort you‘ll be a fertility expert in no time.