5 causes of male infertility

Examples of teratozoospermia or abnormal sperm (in red), with a normal sperm (in blue) for comparison. — 123rf.com

Infertility is suspected when a couple is unable to successfully conceive after approximately one year of unprotected sexual intercourse.

While there are many causes of infertility in both genders, over a third of them stem from the male – primarily due to problems with sperm production or delivery.