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Does Plan B Cause Delayed Periods?

Posted on Tue, 4 Mar 2014

Question: Hi!! I would like to know if is normal to have a delay period after plan b? I change the grand of my birth control pill on January! First week I had un protected sex at 8:00 am! At noon same day I took plan b! Next week day 11 of my new brand of pill I have unprotected sex! He didn't eyaculate inside of me! Now my period is late 4 days! Can I be pregnant ? Or could this be a side effect of plan b? Took home pregnancy test this morning and it was negative

Answered by Dr. Aarti Abraham (13 minutes later)

Brief Answer: EXPLAINED BELOW Detailed Answer: Hello Thanks for writing to us with your health concern. Plan B is notorious for altering the normal expected date of your periods. It can prepone or postpone the normal date of your periods by a week, or even more, sometimes, upto 10 days. SO what you are experiencing is totally normal, dont worry. It is always better to take a pregnancy test anyways 4 weeks after the last episode of unprotected sex. All the best. Please feel free to discuss further.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

Follow up: Dr. Aarti Abraham (1 hour later)

Ok! Thank you for your answer? I don't have any symptom of period coming! The day after unprotected sex and I had cramps Last week a lot of breast pain! And one blood spot. Is this normal too? Or the blood could be implantation? 10 days after unprotected sex?

Answered by Dr. Aarti Abraham (6 hours later)

Brief Answer: EXPLAINED BELOW Detailed Answer: Hello Spotting and cramps also are quite common a few days after taking the emergency contraceptive pill. SO do not worry, even these are most normal symptoms.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

Follow up: Dr. Aarti Abraham (8 hours later)

Ok! Thank you so much! Can I get my period this month while I'm taking the pill? Or I will skip it this month and have it when I stop the active pills next month? It is bad for me if a skip it?

Answered by Dr. Aarti Abraham (2 minutes later)

Brief Answer: EXPLAINED BELOW Detailed Answer: I think most probably you would have your period when you stop the active pills next month. There is really no way to tell because as I said, emergency contraceptives really can mess up with the schedule or normal pattern of your cycles. But dont worry, this effect will only be for one cycle. No ,there would be no side effects if you skip it.

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Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar