About a third of the time, infertility can be traced to the woman. In another third of cases, it is because of the man. The rest of the time, it is because of both partners or no cause is found.
- Pregnancy is the result of a process that has many steps.
- To get pregnant: A woman must release an egg from one of her ovaries (ovulation).
- The egg must go through a Fallopian tube toward the uterus (womb).
- A man’s sperm must join with (fertilize) the egg along the way.
- The fertilized egg must attach to the inside of the uterus (implantation).
- Anything which affects one or more of these processes can cause infertility.