Ovulation Predictor Test

Sometimes, instead of the BBT just discussed, your doctor will recommend that you use a home ovulation predictor test. Like the BBT, the purpose of this test is to determine whether you are ovulating. It's based on the knowledge that luteinizing hormone (LH) reaches a high level in your urine about 24 to 36 hours prior to ovulation. This urine dipstick test picks up that increase in LH in your urine, as you are about to ovulate.

Like the BBT, this is a test that you'll do in the privacy of your home. Ovulation predictor kits may be easier and more accurate than the BBT, but they are also considerably more expensive. See Chapter 5 for more details.

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