Unexplained infertility happens when, without any obvious reason, a couple cannot conceive. If the couple has normal sexual intercourse on fertile days and no pathological cause has been found when all fertility factors have been tested, it means that the couple falls under the category of unexplained infertility.
Assuming that the man has normal sperm production, a woman is affected when she has normal ovulation or endometriosis. Specifically a woman is affected when she has normal ovulation, endometriosis or inaccessible fallopian tubes due to adhesions have not been seen, has frequent contacts the days of ovulation for more than one year minimum, but without result. Few data exists on the normal conception rates in couples with unexplained infertility and it is noteworthy that only 6% of couples that were having thoughts or waiting to start the IVF program achieved normal conception at this time.