The simplest way to learn if you're ovulating is with a home ovulation predictor kit, easily available at drug stores or in the pharmacy section of the supermarket. The kit uses a few drops of urine to check for the increase in luteinizing hormone that usually occurs 24 to 36 hours before an egg is released. The kit needs to be used for several days in a row to track ovulation accurately. Tracking a woman's daily basal body temperature is another method of identifying ovulation.
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Honor Society of Nursing (STTI) answered
Methods for ovulation evaluation include basal body temperature (BBT) charting, ovulation predictor kits, endometrial biopsy, ultrasound, and blood progesterone testing. BBT charting does not directly detect ovulation but it helps indirectly to confirm or disprove ovulation.
Ovulation causes the release of progesterone and increases temperature by 0.5 to 1.0 degree Fahrenheit. Ovulation predictor kits detect luteinizing hormone (LH) in the urine. LH is the brain hormone that stimulates the ovary to release the egg. It is another indirect way to evaluate for ovulation. Endometrial biopsy (removing a piece of tissue from the uterus) will determine ovulation but may produce some discomfort and isn't routinely recommended. Ultrasound can detect egg production, but blood progesterone testing is the definitive method for determining ovulation. Blood is drawn for progesterone one week after ovulation.