Infertility refers to the condition where, despite a couple having regular sexual intercourse without contraception for more than a year, the woman does not become pregnant, at which point infertility is diagnosed. Infertility includes primary infertility and secondary infertility. Primary infertility refers to those who have never been pregnant before; secondary infertility refers to individuals who have previously given birth or been pregnant but later, despite trying to conceive for over a year without contraception and having regular sexual intercourse, are unable to become pregnant.