Having menstruation can also cause infertility because there are so many reasons for infertility. Apart from uterine factors, there are also tubal reasons, ovarian reasons and whether there are any adhesions in the pelvis, which may cause infertility. Having normal menstruation means that the uterine lining is normal and there may be normal ovulation, but if the fallopian tubes are not working, this can also cause infertility. If there are bilateral tubal or pelvic adhesions, although there is normal menstruation, the tubes do not pick up the egg and infertility occurs, due to the inability to combine with sperm.