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Sarasota, FL
A 38-year-old female asked:

I'm on cd 15 and had a positive read this morning on an ovulation predictor test, i retested again later in the afternoon and it was negative - why?

1 doctor answer2 doctors weighed in
Dr. Creighton Likes
Reproductive Endocrinology and Infertility 20 years experience
Possible: There is about a 10-20% false positive with the home ovulation kits. Go ahead and plan on intercourse tonight and tomorrow. If you're not pregnant this cycle, you may need medicine like Clomid (clomiphene) or Femara to help you ovulate regularly...Especially if you have a history of irregular cycles.
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Last updated Jul 21, 2022
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