A successful natural pregnancy occurs when an egg and sperm meet in the fallopian tube and fertilisation takes place. The resulting embryo then implants in the uterine lining. The complex processes involved in egg and sperm production and fertilisation create numerous opportunities for something to go wrong.

Infertility is impairment in the ability to achieve pregnancy. About 1 in 6 couples will seek assistance for infertility. Infertility is defined as either primary infertility, if the couple have never achieved a pregnancy, or secondary infertility, if the couple have achieved a pregnancy before but they are having issues getting pregnant again.

There are multiple causes including both male and female factors that lead to infertility.

Learn about causes of infertility, including:

Infertility in Men

Infertility in Women