I haven't have a length within ages and i want to know why?
Answers: Smoking affects women's normal cyclical change, including those that occur during menopause and menstruation. Women who start smoking during their teen years are more at risk for developing early menopause than women who do not smoke. Smokers may also experience more menstrual problems including peculiar bleeding or AMENHORRHEA (the absence of menstruation) than women who don't smoke. This may be because smoking often lowers level of estrogens in the body..
See your doctor. A combination of stress and weight loss from smoking could exact a cessation of menstrual cycles. This is not a healthy situation. The best thing to do is see your doctor going on for it. They will probably give you birth control to regulate your periods. .
it could be PCOS. step to your doctor/gyn. your gyn will probably give you birth control to regulate them.