More precisely, the particle is a quantized manifestation of a field (the Higgs field) that generates mass through its interaction with other particles.
1 When you stop taking it, you will get your period within 2 to 3 days. 2  However, this is not 100% effective. 3  Women have reported bleeding or spotting while taking progestogen pills. 4  There are now contraceptive shots and even contraceptive implants that stop your period altogether for months in a row. There are in fact contraceptive pills made specifically to stop your period. 2  They are called extended-cycle pills. 3  You would normally take these continuously for three to six months, and then take placebos for a week during which you would get your period.
In addition, if your periods were irregular before taking the pill, your periods may continue to be irregular after stopping the pill. Generally, your period should start four to six weeks after taking your last birth control pill. If you have not begun menstruating after three months, you may have a condition called post-pill amenorrhea. Birth control pills stop your body from producing hormones that trigger ovulation (egg release) and menstruation.