The correct option is D All of the above
Main reason for female infertility are ovulatory problems, blockage of fallopian tube and cervical and vaginal infection. Ovulatory problems prevent production of ovum, blockage of fallopian tube prevents the transfer of ovum from the ovary to the uterus. Cervical and vaginal infection may prevent with sexual intercourse. Infections can also cause infertility. Chlamydia is one of the most common sexually transmitted infections that affect female fertility.