Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.

Last updated: May 5th, 2025

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Discharging of the ovum (or egg) occurs when the rising level of estrogen in the bloodstream causes the hypothalamus to reduce a second substance, luteinizing hormone (LH). This causes one of the follicles to burst and release an ovum for possible fertilization, the escape being known as ovulation.

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