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What Causes Delayed Menstruation Despite Taking Postinor 2?

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Posted on Fri, 10 Jun 2016
Question: I had unprotected sex during or before what would be my normal ovulation period and i took postinor 2 the next morning the correct way. I had unprotected sex again a week before my next period and now im pregnant. When is it likely that this happened and how?
doctor
Answered by Dr. Shafi Ullah Khan (32 minutes later)
Brief Answer:
Suspected contraceptive failure

Detailed Answer:
Thank you for asking
I read your question and i understand your concern. Contraceptive failure is still a possibility with postinor and it varies from 2 to 8 %. Either it was a suspected failure of the pill or result of unprotected coitus you had a week before expected menses. Later is less likely as that time is ovulation free.
Also the test may be false positive and needs to be confirmed by 40th day onwards sonogram.
I hope it helps. Talk to an ObGyn and let them help you in this regard.
I hope it helps. Take good care of yourself and don't forget to close the discussion please .
Regards XXXXXXX
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Shafi Ullah Khan (33 minutes later)
Could it be a result of delayed ovulation caused by the pill? That would result in a delay of the menses causing pregnancy? I had a pinkish spotting 5 days after the second intercourse and I took a test on the day my period was due and it was negative. Three days later, two different tests showed clear positive. I am also having signs such as sore breasts nipples, headaches constantly, etc.
doctor
Answered by Dr. Shafi Ullah Khan (12 minutes later)
Brief Answer:
Needs sonogram to confirm the age

Detailed Answer:
Thank you for getting back to me

Yes that is one of the theory of possibility as well,pills may delay ovulation by delaying the rupture of follicles. So yes that could be a possibility. That all suspicion will be confirmed once the age of conception is evaluated correctly by an ultrasound after 7 weeks of LMP to 8 weeks. Then we will know better which coitus led to it.

I hope it helps.
Regards
Khan
Note: For further follow up on related General & Family Physician Click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
Answered by
Dr.
Dr. Shafi Ullah Khan

General & Family Physician

Practicing since :2012

Answered : 3613 Questions

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What Causes Delayed Menstruation Despite Taking Postinor 2?

Brief Answer: Suspected contraceptive failure Detailed Answer: Thank you for asking I read your question and i understand your concern. Contraceptive failure is still a possibility with postinor and it varies from 2 to 8 %. Either it was a suspected failure of the pill or result of unprotected coitus you had a week before expected menses. Later is less likely as that time is ovulation free. Also the test may be false positive and needs to be confirmed by 40th day onwards sonogram. I hope it helps. Talk to an ObGyn and let them help you in this regard. I hope it helps. Take good care of yourself and don't forget to close the discussion please . Regards XXXXXXX