The contraceptive pill is a drug developed in 1956 by the American doctor Gregory Pincus. It was introduced in Europe in 1961 and in Italy in 1972.
It is a pill to be taken for 21, 22 or even 24 days. Contraceptive drugs are made up of two hormones (an estrogen-l '-ethinyl estradiol and a progestin) can inhibit ovulation of the woman and cause thickening of cervical mucous. The amount of hormones in the pill have been gradually reduced, over the years, but increased security (the risk of getting pregnant using the pill correctly shall be void) for more decreased side effects.
The birth control pills should be started on the first day of menstruation (before the recruitment began from the fifth day). The pill is effective immediately.
The time of birth control pills should be the same in those days set aside, there is a tolerance in this respect, but you should at least respect the time slot.
