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A member asked:
On bc pill 7 months. had short 3 day period (usually 4 days). took pregnancy test after period, negative. there is zero chance of pregnancy correct?
2 doctors weighed in across 2 answers
Really close: there's a small chance due to the variability of the test and the test performer http://www.mayoclinic.org/healthy-lifestyle/getting-pregnant/in-depth/home-pregnancy-tests/art-20047940?pg=2 one source gives a 97% accuracy http://www.babyhopes.com/articles/falsenegative.html but that is in a LAB. the real life results could be 10X higher (1 in 3 failure to detect).At least early on
Answered 10/29/2015
2.1k views
Can never say zero: But if you haven't missed pills, had your period at the right time even though it was a day shorter, and had a negative test after the period, it would be very, very unlikely that you're pregnant. It is common for birth control pills to make your period shorter and lighter, and even no period at all.
Answered 10/29/2015
2.1k views
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