The OV-watch is FDA approved to predict ovulation up to five days in advance for women trying or not trying to have a baby. The watch detects chorine ions secreting through the skin, a chlorine peak indicates an ovulation will occur.The OV-Watch detects the chloride surge 3 days prior to the estrogen surge, 4 days prior to the LH surge and 5 days prior to ovulation, making it an earlier predictor of ovulation than any other chemical surge during the month....

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