Ovulation

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Related to Periovulatory: Ovulatory period

ovulation

[‚äv·yə′lā·shən]
(physiology)
Discharge of an ovum or ovule from the ovary.

Ovulation

 

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 ?
Among these patients, 69 during the perimenstrual phase (days 1-7 and days 21-28) and 86 during the periovulatory phase (days 8-20) were categorized into group M and group O, respectively (Figure 1).
Christenson, "MicroRNA 21 blocks apoptosis in mouse periovulatory granulosa cells," Biology of Reproduction, vol.
(67.) Hapangama D, Glasier AF, and Baird DT (2001), "The Effects of Periovulatory Administration of Levonorgestrel on the Menstrual Cycle," Contraception 63: 123-9.
These phases are associated with increases in negative feelings about women's appearance (Altabe & Thompson, 1990; Carr-Nangle, Johnson, Bergeron, & Nangle, 1994), and could have made the periovulatory ratings seem higher in comparison.
Effect of high temperature and humidity in the periovulatory phase on swine ovarian function.
The ADAMTS1 cleaves the matrix proteoglycans, expressed in the periovulatory follicle.
Chaffin, "hCG-induced down-regulation of PPAR[gamma] and liver X receptors promotes periovulatory progesterone synthesis by macaque granulosa cells," Endocrinology, vol.
Expanding the study adds seven periovulatory measurements of the pituitary hormones, follicular stimulating hormone (FSH), and luteinizing hormone (LH).
Limited peri-ovulatory unprotected sex is a feasible approach to insemination, although both partners must acknowledge the potential risks associated with superinfection, and have a good understanding of how to time intercourse to the periovulatory window (see Box 3).
Neuroendocrine mechanism regulating luteinizing hormone secretion during periovulatory period: Negative and positive feedback actions of estrogen in the brain.
PET/CT assists in localization of normal physiologic uptake, such as that in the rectum or in the corpus luteum in the periovulatory period (134) (Figure 5).