 [ Symptoms ] could my girlfriend be infertile we have been trying for 8 months she believes shes incapable of conceiving no one in her family is infertile on average we have vaginal sexual intercourse about 3 5 times a week  the year prior we dated she would use drugs such as marijuana r2s pills cocaine and heroine never injected i do not know if she was a heavy or light user she drinkssmokes at our familyfriends gatherings about 5 8 beers and cigarettes i was thinking of using the placebo method she also has vaginitis [ Disease ] hi prolonged drug use can affect egg production and maturation affecting fertility levels the chances of successful pregnancy depend on many factors ovarian uterine hormonal stress etc you should consider getting a complete infertility work up done for partner to see if there are any underlying causes for the infertilityinability to conceive do hope this helps both of you good luck