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Discharge of an ovum or ovule from the ovary.



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.

References in periodicals archive ?
We are the only organisation in Scotland authorised to train teachers in the authentic Billings Ovulation Method and are recognised by the Scottish Government.
John Billings, pioneer of the Billings Ovulation Method (BOM), passed away at the age of 89.
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.
John Billings, major developer of the Billings Ovulation Method now used in 130 countries, states: "The facts are incontrovertible.
She was referring to the Ovulation Method which could be learned at St.