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A 16-year-old female asked:

Havnt had period for 2 months then i had protected sex the next day i started very light spotting and it continued for about a week what could this be caused from is it implantation or just period?

1 doctor answer2 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Likely a period, but: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test. If a woman gets her normal regular period, then she is not pregnant, and a test is not needed.

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Last updated Aug 27, 2015

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