Hormones: An ovulation kit only stays positive for a short time. It only stays positive during an lh surge, which only lasts about 2 days. Before and after that it should be negative. Now some women do not ovulate, or they ovulate but with a low hormone level, and other women have a naturally abnormally elevated lh level that interferes with the kits. A change in bleeding pattern can signal problems as well.
Answered 10/3/2016
5.6k views
Blood test for HCG: If you have any doubt about being pregnant, get a blood test for HCG level.
Answered 12/17/2019
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