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.
The FDA approved Seasonique, a slightly different extended-cycle pill,in 2006. It also has 84 days' worth of pills with hormones, but the final pills contain a tiny dose of hormones. The first birth control pill that can make your period go away for a year at a time was approved in 2007. Lybrel contains 365 days' worth of pills with hormones.