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

How do I use the pill? How do I get ... How long do birth control pills take to work? ... The antibiotic Rifampin (other antibiotics do not make the pill less effective).

www.plannedparenthood.org/learn/teens/ask-experts/how-long-does-it-take-for-the-pill-to-become-effective

Nov 22, 2011 ... You will not need to use a backup method of birth control. That means that if your period starts on a Wednesday morning, you can start the pill ...

popit.io/how-soon-birth-control-pills-become-effective

Sep 11, 2017 ... When women use birth control pills, they have many more choices and a lot more freedom than other methods of birth control. Most women ...

www.upmc.com/patients-visitors/education/contraception/Pages/birth-control-pill-instructions-combined-oral-contraceptives.aspx

The birth control pill, also known as “the pill,” is a medicine that can prevent pregnancy, make ... With typical use, about 8 women out of 100 who take the pill may become pregnant in 1 year. This means it is about 92 percent effective in preventing pregnancy. ... Do not stop taking your pills if these side effects happen .

beforeplay.org/how-long-after-i-get-on-birth-control-is-it-safe-to-have-sex

Dec 4, 2013 ... Starting a new method of birth control comes with all kinds of questions. How do I use it most effectively? What are the possible side effects?

www.healthline.com/health/birth-control/how-long-does-birth-control-take-to-work

May 8, 2017 ... Here's how long it takes for each birth control option to work. ... most birth control methods are highly effective at preventing pregnancy, condoms are the ... tubes to prevent an egg from reaching the uterus and being fertilized.

www.refinery29.com/how-does-the-pill-work

Jun 16, 2017 ... An Ob/Gyn explains how long it takes for your birth control pills to kick in ... and figuring it out starts with understanding exactly how pills do their ... be taken exactly correctly and at the same time to be 99.9% effective," she says ...

www.vox.com/2014/9/19/6418767/birth-control-pills-effectiveness-how-to-use-common-questions

Oct 9, 2017 ... There's a three-hour window for taking birth control on time. ... But lots of people don't do that. ... That means nine of every 100 women using birth control pills as their only means of contraception become pregnant in any given year. ... two pills the next day without reducing their birth control's effectiveness.

teenhealthsource.com/birthcontrol/pill-details

Questions, answers and facts about the birth control pill. ... How does the pill prevent pregnancy? In order to get pregnant, sperm must ... This makes it harder for a fertilized egg to implant in your uterus and become a pregnancy. ... Because the pill may be used incorrectly, it is closer to 92% – 97% effective with typical use.