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Combination Pills

How They Work

These pills contain a combination of estrogen and progestin that prevent pregnancy by preventing ovulation, thickening the cervical mucus, or changing the endometrial of the uterus. These pills come in either 21 or 28 day packs.

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When Are They Effective?

Combination pills do not completely protect you during your first cycle. If you are planning of having intercourse during the first week that you start your pills you should use a backup method of birth control because the pills may not protect you from pregnancy during this time.

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Advantages

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Disadvantages

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What To Do If You Miss a Pill

If you miss one active pill...

Take the pill as soon as you remember that you forgot to take it and take your next pill at the usual time.

Two active pills in a row during the first two weeks of the pack...

Take two pills when you remember and take two again the next day. Take one pill every day after that until the pack is finished. It is important that you use another backup method of birth control for seven days after you missed your pills because the possibility of getting pregnant increases when you miss pills.

Two active pills during the third week, or three or more pills in a row during the first three weeks...

What you do depends on whether you are a Sunday-starter or a first day starter:

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Effectiveness

The combination pill has a failure rate of .1% when women are perfect users. This means that one woman out of 1000 will become pregnant in one year if the pill is used correctly. The failure rate among typical users is 5%, meaning that five women out of 100 will become pregnant within one year in typical conditions. Obviously, it is important to use this method as perfectly as possible.

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See Your Doctor Right Away If You Are Experiencing…

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