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» Scarleteen Boards: 2000 - 2014 (Archive) » EXPERT ADVICE » Pregnancy Scares » Plan B right before period

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Author Topic: Plan B right before period
cam555
Neophyte
Member # 110499

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Hello so here is the situation. My gf and I had unprotected sex on May 18. She was scheduled to start her period on roughly the 19/20th. I bought her plan B and she took it on the 19th, less than 24 hours since sex. It is now June 5, 17 days since the incident, and no signs of her period. I've heard plan b can delay it significantly but it's worrying. Not to mention that she told me earlier today that this whole week she's felt slightly nauseous and dizzy. I'm going to go buy a pregnancy test but I'm curious what are the chances that she is pregnant?

Thanks

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Heather
Executive Director & Founder
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Plan B is around 95-98% effective when used within 24 hours.

That means you were/are looking at a pregnancy risk of only around 3-5%. Could happen, but it isn't likely.

But all you two can really do right now is go ahead and take that test and see.

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Sam W
Scarleteen Volunteer
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Hi Cam,

[edit: cross posted with Heather]

So, since unprotected sex did occur, there is still some risk of pregnancy. Plan B is up to 98% effective when taken within 24 hours, so the chances of pregnancy are low, but still present. You can read more about that here:
Emergency Contraception (Plan B or the Morning-After-Pill)

You are correct that Plan B can make periods irregular, so her taking a test is the best way for her to know for sure whether or not she is pregnant.

And, since unprotected sex occurred, are you both up to date on your STI tests?

[ 06-05-2014, 03:17 PM: Message edited by: Sam W ]

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cam555
Neophyte
Member # 110499

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No we are not. This is the only time in 8 months of dating that we have had unprotected sex. Does taking plan b right before her period affect anything?
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Karybu
Scarleteen Volunteer
Member # 20094

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Plan B can affect the menstrual cycle whenever it is taken. Whether that will happen for your girlfriend is not something anyone could possibly predict. At this point, the next step is for her to take a pregnancy test.

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"Another world is not only possible, she is on her way. On a quiet day, I can hear her breathing." -Arundhati Roy

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