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Discharge of an ovum or ovule from the ovary.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the discharge of the ovum from the ovary into the body cavity. The follicle that contains the ovum ruptures during ovulation; in humans and mammals it is called the Graafian follicle. Ovulation occurs periodically in females of most vertebrates and in women. In some animals, for example, the rabbit, cat, and polecat, it is triggered by copulation. It is stimulated by gonadotrophic hormones, which are secreted by the pituitary gland and are controlled by the central nervous system. In birds the number of daylight hours is a signal for ovulation; in fish, water temperature.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Creighton-Model Ovulation Method of natural family planning.
How very important it is today that whenever and wherever the truth of Humanae vitae is taught, the life-line of the Billings Ovulation Method be offered to couples.
But from the reports of millions of women using the Billings Ovulation Method over four decades, from the daily study of approximately 10,000 ovarian cycles in a large spectrum of women, from non-intrusive ultra sound studies, and from hormonal monitoring of 750,000 cases.
This was the occasion of my mother revisiting the topic: "You are going to need something else during breast feeding," she told me, "and I think this might be it." She was referring to the Ovulation Method which could be learned at St.
It may be that when the Guide recommends that "health associations and organizations promote the various methods of regulation of conception that respect a woman's natural fertility cycles," it intended to refer only to the natural family planning methods, such as the Creighton model, the Billings Ovulation method, or the Serena method.
Evelyn and John Billings in the verification of the reliability of the Billings Ovulation Method, the most widely used and successful method of natural family planning today.