If you’re a guy, the most common reason for infertility is a problem with Sperm, including things like:
- Low sperm count, which means you have too few or no sperm in your semen
- Your sperm don’t move as well as they should, which is called low sperm motility.
- You have abnormally formed sperm.
- Your sperm ducts are blocked.
Another common problem is a temporary drop in the amount of sperm you make. This might happen when your testicles get injured. For instance, it could be that your testicles were too hot for too long, or you were in contact with chemicals or took drugs that affect the way you make sperm.
The main reason for infertility is that you don’t ovulate, which means you don’t release an egg from an ovary. A condition called polycystic ovary syndrome is the main cause.
Problems with your fallopian tubes, which carry eggs from the ovary to the uterus, are a common cause of infertility. Sometimes your tubes are blocked by scar tissue from an infection or from a condition called endometriosis.