Unexplained infertility cases are diagnosed when standard infertility testing cannot find a cause for the failure to conceive.
- Female infertility accounts for one-third of infertility cases, male infertility for another one-third, combined male and female infertility for another 15 per cent, and around 15 per cent of all infertility cases are unexplained.
- Up to 60 per cent of couples with unexplained fertility for three years or less will conceive within three years without intervention.
- A couple who have experienced five years of infertility have a less than one in 10 chance of conceiving without intervention.
- The most successful treatments for unexplained infertility are: the use of drugs to aid in ovulation for several cycles, intrauterine insemination (IUI) and in vitro fertilisation (IVF).
- Among the causes underlying unexplained infertility are: psychological factors, weak sperm, abnormal Fallopian tubes or eggs, immune problems or infection.