Pregmate ovulation tests detect LH (Luteinizing Hormone) in urine.<br /><br />Luteinizing Hormone is one of the hormones produced by the pituitary gland. It is secreted at very low levels throughout your menstrual cycle. Once a developing egg follicle reaches a certain size, LH secretion surges to high levels. This hormone surge is what triggers ovulation. A positive test result indicates the presence of a high amount of Luteinizing Hormone or LH surge. The amount of LH in your body will begin to decrease after ovulation, so you will only get a positive result during that crucial fertile period. Once the egg is released, it is only viable for about 24 hours. After that, your fertile window is over. This makes it very important to be able to identify this best time to conceive.
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