| 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) |
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| 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) |
| ovarian plexus | An autonomic plexus derived from the aortic plexus and accompanying the ovarian artery to the ovary, broad ligament, and uterine tube. Synonym: plexus ovaricus. (05 Mar 2000) |
| ovarian pregnancy | Development of an impregnated ovum in an ovarian follicle. See: Spiegelberg's criteria. Synonym: oocyesis, ovariocyesis. (05 Mar 2000) |
| ovarian stromal tumours | <radiology> Age 20 - 50 yrs, 20% of all ovarian tumours, fibroma / fibrosarcoma, granulosa-theca cell tumour, with or without oestrogens most likely to be precocious puberty, endometrial hyperplasia/carcinoma, fibrocystic breast disease, Sertoli-Leydig cell tumour, aka: arrhenoblastoma, with or without androgens most likely to be masculinization, may be mixed type (12 Dec 1998) |
| ovarian teratoma | See: Ovary, dermoid cyst of the. (12 Dec 1998) |