well, i am a smoker, and slightly overweight ,and have sucessfully used birth control for years. If u r under 35 its less, and the less you smoke the better. But if u r a heavy smoker, u may need to cut down. This is really a better discussion for your doctor. But if this month is the only one that has ever been abnormal, your gyno may not put u on birth control, because most women miss one or get one late on occasion.

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