Question: what are causes of female infertility?
Answer: Failure to Ovulate. The most common overall cause of female infertility is the failure to ovulate, which occurs in 40% of women with infertility issues. ... 
Problems in the Menstrual Cycle. ... 
Structural Problems of the Reproductive System. ... 
Infections. ... 
Failure of an Egg to Mature Properly. ... 
Implantation Failure. ... 
Endometriosis.