A minute of liquid: there are combined oral contraceptives, COCs, with estrogens and progestin, usually drunk according to the scheme of 21 days of intake + 7 days of break, provoke menstrual-like bleeding, regular (with an accuracy of up to half an hour) and painless. Sometimes they are taken without interruption, which allows you to suppress bleeding in general, do so after consulting a doctor and not longer than several cycles.
And there are also purely prostagenic, take them non-stop, and there is either no bleeding at all, or very weak and completely irregular (a day a week, for example).
Oral contraceptives are selected individually and it is necessary to monitor hormones and platelets once every six months against the background of reception.
And girls and boys need to know about this, because the health of partners and family planning is important.

All goodness, knowledge, life without pain, fireworks sex, desirable children.