premature ovarian failure

failure /fail·ure/ (fāl´yer) inability to perform or to function properly.

---

acute congestive heart failure  rapidly occurring cardiac output deficiency marked by venocapillary congestion, hypertension, and edema.

backward heart failure  a concept of heart failure emphasizing the causative contribution of passive engorgement of the systemic venous system, as a result of dysfunction in a ventricle and subsequent pressure increase behind it.

bone marrow failure  failure of the hematopoietic function of the bone marrow.

congestive heart failure  (CHF) that characterized by breathlessness and abnormal sodium and water retention, resulting in edema, with congestion of the lungs or peripheral circulation, or both.

diastolic heart failure  heart failure due to a defect in ventricular filling caused by an abnormality in diastolic function.

forward heart failure  a concept of heart failure that emphasizes the inadequacy of cardiac output relative to body needs and considers venous distention as secondary.

heart failure  inability of the heart to pump blood at a rate adequate to fill tissue metabolic requirements or the ability to do so only at an elevated filling pressure; defined clinically as a syndrome of ventricular dysfunction with reduced exercise capacity and other characteristic hemodynamic, renal, neural, and hormonal responses.

high-output heart failure  that in which cardiac output remains high; associated with hyperthyroidism, anemia, arteriovenous fistulas, beriberi, osteitis deformans, or sepsis.

kidney failure  renal f.

left-sided heart failure , left ventricular failure failure of adequate output by the left ventricle, marked by pulmonary congestion and edema.

low-output heart failure  that in which cardiac output is decreased, as in most forms of heart disease, leading to manifestations of impaired peripheral circulation and vasoconstriction.

premature ovarian failure  premature menopause.

renal failure  inability of the kidney to excrete metabolites at normal plasma levels under normal loading, or inability to retain electrolytes when intake is normal; in the acute form, marked by uremia and usually by oliguria, with hyperkalemia and pulmonary edema.

right-sided heart failure , right ventricular failure failure of adequate output by the right ventricle, marked by venous engorgement, hepatic enlargement, and pitting edema.

systolic heart failure  heart failure due to a defect in the expulsion of blood that is caused by an abnormality in systolic function.

failure to thrive  physical and developmental retardation in infants and small children, sometimes from physical illness and sometimes from psychosocial effects such as maternal deprivation.

---

ovarian

pertaining to an ovary.

---

ovarian agenesis

one or both ovaries absent; usually accompanies defects of the tubular reproductive organs.

ovarian anomaly

includes ovarian dysgenesis (see below), agenesis (above) or hypoplasia, as in Swedish Highland cattle.

ovarian bursa

a pouch formed by the mesosalpinx and the mesovarium that encloses the infundibulum of the uterine tube and the ovary. It is shallow in the mare and does not enclose the ovary. It is capacious in sows and deep with a fat-filled wall in the bitch.

ovarian bursitis

inlammation of the ovarian bursa; likely to affect the function of the ovary and ovulation.

ovarian cycle

the cycle of follicle maturation and rupture, then luteinization and regression of the corpus luteum followed by recommencement of the cycle, unless pregnancy intervenes.

ovarian cyclicity

the regular appearance of estrus as an indication of the regular occurrence of estrous cycles.

ovarian cyst

see cystic ovarian disease (below).

cystic ovarian degeneration

persistent cysts derived from ovarian follicles which do not ovulate. Follicular cysts are thin-walled and fluctuant, and often multiple. Luteal cysts have a thick wall of luteal tissue about the cyst, are firm to palpate and do not rupture easily. There is abnormal estral behavior, either anestrus or nymphomania, and diminished fertility.

Cystic corpora lutea form after ovulation has occurred and do not interfere with reproduction. They have a characteristic ovulation papilla.

cystic ovarian disease

common disease of cows, less common in sows, characterized by gross abnormalities of estrus, either anestrus or more frequent and prolonged. In cows the cysts can be palpated per rectum.

ovarian dysgenesis

small, inactive ovaries lacking germ cells such as occur in mares lacking a second X chromosome.

ovarian follicle

see ovarian follicle.

follicular ovarian cyst

see cystic follicle.

ovarian hormones

estrogens, progesterone.

ovarian hypoplasia

functional hypoplasia in immature females and undernourished females of all ages are common findings; in the absence of these risk factors hypoplasia is genetic in origin in Swedish Highland and possibly white Ayrshire cattle.

ovarian imbalance

an alternative name of endocrine dermatoses caused by abnormalities of ovarian function in bitches. Type I, associated with cystic ovaries or functional ovarian tumors, consists of a bilaterally symmetrical alopecia, gynecomastia, enlargement of the vulva, and abnormalities of the estrous cycle. Type II is a bilaterally symmetrical alopecia, sometimes with seborrhea, in spayed bitches. It is responsive to treatment with estrogen. Called also estrogen-responsive dermatosis.

ovarian inflammation

see oophoritis.

intrafollicular ovarian hemorrhage

hemorrhage into an ovarian follicle occurs in all species during ovulation; also rarely in anovulatory follicles.

luteal ovarian cyst

see luteal cyst.

luteinized ovarian cyst

see luteal cyst.

ovarian neoplasms

includes mostly granulosa cell tumors, but also rarely carcinomas, fibromas, thecomas, sarcomas.

ovarian pain

a rare cause of colic in mares; identifiable by eliciting pain by rectal palpation of ovary.

premature ovarian failure

defective differentiation of ovarian tissue and the patient shows no signs of pubertal estrus until long past the customary age.

ovarian rebound

return of cyclical ovarian activity after a period of inactivity, usually pregnancy and parturition.

ovarian remnant syndrome

the return of estral activity in a desexed female; due to failure to remove all of the ovarian tissue or to dropping, and allowing to implant, a piece of the ovary.

rete ovarii ovarian cyst

a convoluted system of epithelial cell cords and tubules occupying part of the ovarian medulla; the cysts are found mostly in the hilar region of the ovary.

ovarian serous inclusion cyst

similar in size and appearance to, but distinguishable from, ovarian cysts by their intraovarian position; lined by cuboidal epithelium thought to be pinched off from indentations of surface epithelium.

tubular epithelial ovarian cyst

formed from epithelial cells from the surface of the ovary.

---

premature ovarian failure

Cessation of menses before age 40, often accompanied by ↑ serum gonadotropin Etiology Idiopathic, or 2º to ovarian receptor antibodies, viral infection, cytotoxic drugs, RT, etc