Hi, I would love to know if there are any other reasons for not conceiving aside from PCOS, low sperm, irregular periods etc. I've been checked and have no problems with my uterus, Fallopian tubes, periods etc. I don't smoke or drink, I'm a healthy weight and don't eat processed foods. Friends of mine who do drink and smoke and are younger than I an, have children, which is great as I adore their children, but I really can't understand why I've never even been pregnant. What other things can I be doing to increase my chances of having a child? Thank you in advance!