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» Scarleteen Boards: 2000 - 2014 (Archive) » EXPERT ADVICE » Ask Scarleteen » How does the protection work?

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Author Topic: How does the protection work?
bitttersweeeeeet
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I was just wondering how the birth control pill works so you remain protected from pregnancy during the placebo week?
Posts: 72 | From: Toronto, Ontario, Canada | Registered: Aug 2005  |  IP: Logged | Report this post to a Moderator
dailicious
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Basically, the hormones in the pill are mocking your body's normal cycle - the body has an increase of the hormone progesterone (one of the hormones simulated in hormonal birth control) which is produced by the ovaries after an egg is released, to help build up the uterine lining to nourish an egg if it is fertilized and implanted. In a normal cycle, if an egg is fertilized, more progesterone is produced, and if not? Then the level of progesterone drops, and this signals your body to expel the uterine lining and start the process all over again.

So, with hormonal birth control, your body is receiving an artifical type of progesterone, and during the placebo week, the drop in hormones when you stop taking active pills after mimicks that natural drop that signals your body to expel the uterine lining and you'll receive your withdrawl bleed - and after 21 days of active pills, your body won't be signaling itself to produce the hormones which cause an egg to mature and be released.

Does that make sense?

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Jean
aka dailicious
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bitttersweeeeeet
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It makes sense, yes; thank you.

I still find it fascinating the way it works though and still keeps one protected even though they aren't having any hormones.

Would it be right to say that basically, its cause after the 21 days there's a build-up that protects you enough?

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KittenGoddess
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No, it's more because you aren't ovulating. When the extra hormones are no longer there, your body is preparing to get rid of that lining, which means it isn't at a time when ovulation would happen.

http://www.scarleteen.com/forum/ultimatebb.php?ubb=get_topic;f=21;t=000351

Check out the links in that thread...that may help.

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Sarah Liz

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