Ovulation test strips are urine-based tests that you use at home to detect impending ovulation. They work by detecting the hormone LH. Sometimes they are called OPKs, ovulation predictor kits, or sim... View MoreOvulation test strips are urine-based tests that you use at home to detect impending ovulation. They work by detecting the hormone LH. Sometimes they are called OPKs, ovulation predictor kits, or simply ovulation tests. ... Using ovulation strips can help you time sex for pregnancy.
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