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Chicago, IL
A 20-year-old female asked:

Had unprotected sex 11/5 took plan b 11/7 and got period 11/13-17 or 18 took pregnsncy test 12/17 it's positive when did i conceive? please help

1 doctor answer1 doctor weighed in
Dr. Karen Jones
Obstetrics and Gynecology 37 years experience
No way to know yet: Since you had unprotected sex, took Plan B and bled afterward and now a month later have a positive pregnancy test there is no way yet to know when you conceived. This is because Plan B often causes irregular bleeding, and using when the period was to know when conception happened only works with regular periods. Once you have an ultrasound we'll be able to tell about when conception occurred.

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Chicago, IL
A 20-year-old female asked:

Had unprotected sex 11/5 took Plan B 11/7 got period 11/13-18 had unprotected sex on 11/26 took pregnancy test 12/17 read positive when did i conceive?

1 doctor answer1 doctor weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
Around 11/26: Conception, as defined by the generation of a fertilized ovum, likely occurred within day or so of the sex on 11/26. Please seek care from a doctor to protect your and your baby's health.

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Last updated Jun 30, 2014

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