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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 It might be outdated or ideologically biased.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 ?
This can be reassuring, giving you confidence that you did ovulate.
"Excess body fat can lead to an overproduction of certain hormones that disrupt ovulation while too little body fat can disrupt the menstrual cycle, meaning you ovulate less often." Consider working with a nutritional therapist on a personalised diet and lifestyle plan, suggests Sandra.
These women do not ovulate regularly and they show signs of androgen excess like increased hair growth on face and body, acnes and obesity.
Women's cycles may be less regular and they may ovulate less often.
These changes involved not only the ovulate cone itself, but surrounding structures and, most importantly, the pollen.
Unlike humans, cows, horses and sheep, which ovulate on a regular cycle, some animals rely on a little action to get their eggs moving.
As female pandas ovulate once a year, experts tell us Tian Tian is ready for some serious woo-wooing - but Yang Guang only has a window of 36 hours to do it.
Seven women in the MSX group and 8 in the CC group did not ovulate. These women were given CC-MSX combination therapy for up to 16 weeks or four cycles.
Women with PCOS ovulate irregularly and/or infrequently, and often have irregular menstrual periods.
This is known as mating to 'foal heat'; there is a period after giving birth when mares ovulate and are thus receptive to being covered.