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ovulation The release of an egg cell from the ovary, which in mammals is stimulated by luteinizing hormone. The developing egg cell within its follicle migrates to the ovary surface; when mature, it is released from the follicle (which breaks open) into the body cavity, from where it passes into the oviduct. See also menstrual cycle.
ovulation (ov-yoo-lay-shŏn) n. the process by which an ovum is released from a mature Graafian follicle. The fluid-filled follicle distends the surface of the ovary until a thin spot breaks down and the ovum floats out and starts to travel down the Fallopian tube to the uterus.
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