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Ovulating is a process that the ovary releases ovums. Luteinizing hormone(LH) increases when women are in middle menstruate up to a peak. Then within the 48hours after that, it simulates the ovary to release the mature ovums, in which women get pregnant easily.Usage of LH Test(Strip): 1.Place thestrip in urine stream for at least10 seconds. Do not passed the mark "Max". 2. Wait for color bands to appear and read the results.Results: 1. Positive: 1) Two colour bands appear. 2. Negative: only one colour band appears, then no LH peak or peak passed. No any colour band is invalid.