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A 24-year-old female asked:

Woud early pregnancy cause an ovulation predictor test to give a false positive?

2 doctor answers3 doctors weighed in
Dr. Pavel Conovalciuc
Family Medicine 25 years experience
No: If you're pregnant, there's no ovulation, so i don't see how ovulation test would be indicating that you are near ovulation.
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Dr. Wendy Askew
Dr. Wendy Askew commented
undefined 26 years experience
Actually, early pregnancy will cause a false positive result, because one subunit of the hcg molecule is structurally identical to that of luteinizing hormone (the one that triggers ovulation to occur) and is measured by OPKs to detect ovulation. The home tests aren't sophisticated enough to differentiate one from the other.
Aug 19, 2013
Dr. Wendy Askew
26 years experience
Yes: One subunit of pregnancy hormone HCG is structurally identical to the hormone that is measured in the ovulation prediction kits (luteinizing hormone) and most home tests don't differentiate between the 2 hormones, so yes, pregnancy can give a false + for ovulation.
Created for people with ongoing healthcare needs but benefits everyone.

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Last updated Sep 12, 2017


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