The beginning of the use of contraceptive during menstruation can make the stop menstruation, but this will not occur immediately. That is, the woman who is menstruating and begins to use contraceptive, can stop the bleeding from a few days.
A woman who is already on the birth control pill and does not want to have monthly bleeding (menstruation) can amend the cards to avoid menstruation. If there is no pause between one card and another, menstruation will not occur. If the woman wants this effect for a long time, it is recommended to consult the gynecologist, family doctor or general practitioner to evaluate the contraceptive method most indicated in this situation.