OPK: The fertility window is a very small one. It is best to track ovulation using an ovulation predictor kit (opk) which can be found over the counter in pharmacies. Intercourse can then be timed to ovulation. Start checking in the afternoons daily starting on the 10th day after your cycle starts. On the first positive day, start intercourse that day and for 2 more days. Good luck.
Answered 3/22/2020
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