| OSA | obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectio... |
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| OTR | Ovarian Tumor Registry; Occupational Therapist, Registered |
| OVC | ovarian cancer |
| OvDF | ovarian dysfunction |
| OWR | Osler-Weber-Rendu [syndrome]; ovarian wedge resection |
| ovarian cyst | <gynaecology> The ovary will form a fluid filled cyst on the surface of the ovary each month after an egg is released from the ovary during normal ovulation. Larger cysts can cause pain and bleeding (rupture). (27 Sep 1997) |
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| ovarian cystic disease | <gynaecology> A painful condition associated with the recurrent formation of large ovarian cysts. Distention of the ovarian capsule causes pain and rupture of a larger cyst can, in rare instances, cause internal bleeding. Treatment often includes hormone manipulation (birth control pills). (05 Jan 1998) |
| ovarian cysts | General term for cysts and cystic diseases of the ovary. (12 Dec 1998) |
| ovarian dysmenorrhoea | A form of secondary dysmenorrhoea due to disease of an ovary. (05 Mar 2000) |
| ovarian failure, premature | Premature failure of ovulation associated with hypergonadotropinism and hypoestrogenism in women under the age of 40. The aetiology appears to be multifactorial and many cases are idiopathic. When follicles are present but the ovaries are unable to respond to gonadotropins, resistant ovary syndrome results and this may be associated with autoimmune disease. Even when there is a loss of ovarian follicles, it is not always complete. Permanent and irreversible loss of follicles is termed premature menopause (menopause, premature). (12 Dec 1998) |
| ovarian fibroma | <radiology> Bilateral in 10%, malignant counterpart (fibrosarcoma) very rare, associated with Meigs syndrome (12 Dec 1998) |
| ovarian fimbria | The longest of the fimbriae of the uterine tube; it extends from the infundibulum to the ovary. Synonym: fimbria ovarica, infundibulo-ovarian ligament. (05 Mar 2000) |
| ovarian follicle | <biology, gynaecology> In mammals the group of cells around the primary oocyte proliferate and form a surrounding noncellular layer. A space opens up in the follicle cells and the whole structure is then the ovarian Graafian) follicle. (05 Jan 1998) |
| ovarian fossa | A depression in the parietal peritoneum of the pelvis; it is bounded in front by the obliterated umbilical artery, and behind by the ureter and the uterine vessels; it lodges the ovary. Synonym: fossa ovarica, Claudius' fossa. (05 Mar 2000) |
| ovarian function tests | Methods used for assessment of ovarian function. (12 Dec 1998) |
| ovarian granulosa cell | <biology, gynaecology> During oogenesis in mammals the ovarian (Graafian) follicle, in which the developing ovum lies, is lined with follicle cells, the peripheral follicle cells form the stratum granulosum or ovarian granulosa. (05 Jan 1998) |
| ovarian granulosa-theca cell tumour | <radiology> Any age, most benign, oestrogens may lead to isosexual precocious puberty (pathognomonic), large tumour with areas of cystic degeneration (12 Dec 1998) |
| ovarian hormone | <protein> Polypeptide hormone produced by corpus luteum and found in the blood of pregnant animals. Acts, as its name suggests, to cause muscle relaxation during parturition. Human relaxin has an A chain of 24 amino acids and a B chain of 29. Has structural similarity to insulin. (18 Nov 1997) |
| ovarian hyperstimulation syndrome | <syndrome> Syndrome composed of a combination of ovarian enlargement and an acute fluid shift out of the intravascular space. The enlargement is caused by ovarian cyst formation and the fluid shift may result in ascites, hydrothorax, or generalised oedema. The syndrome is most usually seen as a complication of ovulation induction, a treatment for infertility. (12 Dec 1998) |
| ovarian ligament | <anatomy> A cordlike bundle of fibres passing to the side of the uterus from the lower end of the ovary, between the folds of the broad ligament (mesovarium). Synonym: ligamentum ovarii proprium, proper ligament of ovary. (05 Mar 2000) |