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Fewer than one out of every 100 women who use Ortho Evra will become pregnant with perfect use.--from Planned Parenthood website

the Birth Control patch must be applied within the first 24 hours of starting your period or you must use back up contraception.

The short answer is "little chance."

HOWEVER, this is assuming that the patch is used exactly as prescribed and is used correctly. KEEP in mind that a birth control patch is like birth contol pills: they are 98%-99% effective, and they DO NOT protect either one of you from STD's-sexually transmitted disease.

To be extra safe from pregnancy or disease you really should use something else WITH the patch. CONDOMS are probably the best choice, but if you WILL NOT use one, I have another suggestion. There are little suppositories that goes in the girl's vagina about 15 minutes before sex. You don't need a prescription, they are in the pharmacy section. They melt in the girls vagina and prevent pregnancy also. PLUS, they have Nonoxyl-9 in them that also kills AIDS virus. One brand name is ENCARE. There are also other brands. Like I said CONDOMS are THE BEST bet, but if you absolutely won't use one, at least use something like Encare. Look on the box to make sure it has Nonxyl-9. Be SAFE.

.
Failure rates (first year)Perfect use≈1%Typical use≈1-2%

courtesy of wikipedia
no, me and my gf r having our 1st child. she OS 6 wks. prego and she was using the birth control patch and has been for the past 2 yrs.
No, the patch should be regulated into your body by now.
If used correctly, about 98%.
Birth control only protects you 98% against pregnancy. There is still a 2% risk of conceiving while on Birth control.

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โˆ™ 2013-03-06 01:53:27
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Q: How effective is the birth control patch?
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Related questions

Is the birth control patch as effective as Depo-Provera?

No, the patch is less effective than the shot.


Is the birth control patch still effective if a piece of hair is stuck on it?

Yes, just as the birth control patch is still effective if applied to a spot (like the arm or leg) with hair, the patch is effective if a hair is stuck to it.


Birth control patch or rhythm method?

The 'rhythm method' is not safe sex or effective as a birth control.


Is the birth control patch more effective than the birth control pill?

With perfect use, the pill and patch are equally effective. Because you only have to remember to do something with the patch weekly, unlike the pill which is daily, it's harder to make mistakes.


Does the birth control patch work during your period?

If you use it correctly for at least one week, the birth control patch is effective even if you're bleeding. You still have protection during the patch-free week if you used the patch correctly in the previous weeks.


When was the birth control patch invented?

The birth control patch was approved by the FDA in 1992.


Can early removal of the birth control patch cause a late period?

Yes, early removel of the birth control patch may cause an early or late period. Since you weren't using effective birth control, take a pregnancy test if your period is late.


Can you swim if you're on the birth control patch?

Yes, you can swim if you're on the birth control patch.


Does birth control patch involve hormones?

Yes, the birth control patch is a hormonal method


Is the birth control patch as effective as the birth control pill?

Both are advertised as 99% effective against pregnancy. However, the patch is advertised as being more apt to cause blood clots in women, particularly those who smoke and/or over age of 35.


Can stopping the birth control patch cause spotting?

Yes, stopping the birth control patch can cause spotting. Your period should return to its previous pattern within one or two cycles. If you have not been using effective birth control and are experiencing spotting, take a pregnancy test.


Can the birth control patch affect future fertility?

The birth control patch does not affect future fertility. People become pregnancy at the same rate after patch use as those who never used the patch or hormonal birth control.


Does NyQuil affect the birth control patch?

There are no known drug interactions between NyQuil and the birth control patch


Does the birth control patch prevent ovulation?

The birth control patch's primary mode of action is preventing ovulation.


Does ciprofloxacin affect the birth control patch?

There are no known drug interactions between ciprofloxacin and the birth control patch.


Does dextromethorphan affect the birth control patch?

There are no known drug interactions between dextromethorphan and the birth control patch


Does penicillin affect the birth control patch?

There are no known drug interactions between penicillin and the birth control patch.


Will the birth control patch alter your ovulation cycle?

The birth control patch is meant to prevent ovulation completely.


Does acetaminophen affect the birth control patch?

There are no known drug interactions between acetaminophen and the birth control patch


Can you put on the birth control patch during your period?

Yes, you can put on the birth control patch during your period.


Does concerta affect the birth control patch?

There are no known drug interactions between Concerta and the birth control patch.


Does Klonopin affect the birth control patch?

There are no known drug interactions between klonopin and the birth control patch.


Where do you get the birth control patch?

You can get the birth control patch with a prescription at any pharmacy. The patch may also be available at your local family planning agency.


Can you reuse a birth control patch?

No, you can't reuse a birth control patch. When you remove a patch, whether on time or early, you should discard it as it is of no use.


How do you change from the birth control patch to the birth control pill?

Normally you would start the birth control patch on the day you were scheduled to start the next pack of pills.