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How Does Birth Control Work?
Of the many forms of birth control, the most common is the pill. The pill is a doctor-prescribed plan that is administered in either a 21- or 28-day cycle. A pill is taken at the same time each day to control the woman's ovulation system.... More »
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en.wikipedia.org/wiki/Combined_oral_contraceptive_pill

The combined oral contraceptive pill (COCP), often referred to as the birth control pill or .... If the pills do not use a monthly cycle, ask a doctor for information. .... Cancer (IARC) working group said COCs increase the risk of cancers of the breast ...

goaskalice.columbia.edu/answered-questions/how-do-birth-control-pills-work

Apr 21, 2015 ... Dear Woman,. Birth control pills prevent pregnancy through several mechanisms, mainly by stopping ovulation. If no egg is released, there is ...

www.plannedparenthood.org/learn/birth-control/birth-control-pill

Birth control pills are a medicine with hormones that you take every day to prevent pregnancy. The pill is ... How do I make the pill work best for me? The main ...

www.plannedparenthood.org/learn/birth-control/birth-control-pill/how-effective-is-the-birth-control-pill

How long do birth control pills take to work? It depends on when you start taking them. You can take your first birth control pill any day of the month, but you may ...

sitn.hms.harvard.edu/flash/2008/issue40

Mar 15, 2008 ... Simply put, how does the mechanism of oral contraceptives guide us in their ... How popular this newly-advertised birth control regimen will be ...

www.webmd.com/sex/birth-control/birth-control-pills

When taken as directed, birth control pills are usually effective the first month you begin taking ...

www.arhp.org/hormonalcontraception

Correct and consistent use of hormonal contraception greatly reduces the risk of pregnancy, but does not prevent transmission of sexually transmitted infections.

kidshealth.org/en/teens/contraception-birth.html

The Pill is an effective form of birth control, but even missing 1 day increases the chance of getting pregnant.

www.healthywomen.org/condition/birth-control-pills

Keep in mind that birth control pills only work if you take them every day. They do not accumulate or collect in your body, which is why you must take a pill every ...