But missing pills, taking certain medications, and other things may make it not work as well. So in reality, 9 out of pill users get pregnant each year. The better you are about taking your pill every birth control effectiveness and weight and starting your pill packs on time, the better it will work. You can use our birth control app to remind you to take your pills everyday, birth control effectiveness and weight.
If effectiveness is the most important thing to you when picking what birth control to use, you might want to check out IUDs and the implant. But if you decide the pill is right for you, make sure you take them on time for the best effectiveness.
It depends on when you start taking them. You can take your first birth control pill any day of the month, but you may need a backup birth control method like condoms for the first 7 days.
For example, if you get your period Monday morning, you can start the pill anytime until Saturday morning and be protected from pregnancy right away. You can start progestin-only pills at any time. So use another method of birth control like condoms if you have vaginal sex during the first 48 hours, birth control effectiveness and weight.
The main thing that makes the pill not work is not taking it every day. But other things, birth control pills and sex drive having vomiting or diarrhea for more than 48 hours may reduce how well the pill prevents pregnancy.
The pill may be a little less effective for very overweight women. Some medicines or supplements can also make it not work as well:. Help us improve - how could this information be more helpful? How effective is the pill? How safe is the pill? How do I use the pill? How do I get the pill?
What are the benefits of the pill? What are the disadvantages of the pill? X in a circle Want the Pill? Was this information helpful? Yes No Help us improve - how could this information be more helpful? Birth control effectiveness and weight did this information help you? Send Now No Thanks. Use a condom with your pill to help stop pregnancy and STDs.