amenorrhea

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amenorrhea

(āmĕn'ərē`a, əmĕn'–), cessation of menstruationmenstruation,
periodic flow of blood and cells from the lining of the uterus in humans and most other primates, occurring about every 28 days in women. Menstruation commences at puberty (usually between age 10 and 17).
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. Primary amenorrhea is a delay in or a failure to start menstruation; secondary amenorrhea is an unexpected stop to the menstrual cycle. It is caused by dysfunctioning of the pituitary gland, ovaries, uterus, and hypothalamus, by surgical removal of the ovaries or uterus, by medication, or by emotional trauma. The result is an inadequate amount of body fat, calories, and protein to sustain menstruation. Female athletes have a higher than average rate of menstrual dysfunction, particularly amenorrhea, but the long-term effects of the exercise-related disorders are not known. It is also common among anorexics. The lack of estrogen, however, may contribute to the development of osteoporosis. Hormonal deficiencies over prolonged periods of time, particularly in combination with poor diets, may cause luteal phase deficiency and hypoestrogenic amenorrhea, which may last a long time. Methods of treatment include oral contraceptives or estrogen-progestin therapy.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Amenorrhea

 

the absence of menstruation. As a physiological phenomenon it is found in girls until the time of sexual maturity, among pregnant and lactating women, and in older women after the climacteric. In all other cases, the condition indicates some form of illness.

A distinction is made between primary amenorrhea, in which no menstruation has ever occurred in the individual, and secondary amenorrhea, in which menstruation previously took place and has ceased. Amenorrhea is associated with disruption of the ripening of the follicle and formation of the corpus luteum; it may be brought on by acute or chronic infection, disease of the endocrine glands, neuro-psychiatric disorders (“war amenorrhea,” for example), cardiovascular or blood disease, and so forth. The condition may result from X-ray or radioactive irradiation of the ovaries, chronic poisoning (for example, by alcohol, nicotine, or lead), exhaustion (from hunger, undereating, or malnutrition), extreme adiposis, and so forth. In some women amenorrhea makes its appearance accompanied by extreme fatigue, either physical or mental, as in the case of students at the time of examinations. Amenorrhea may be the result of artificial abortion or of cauterization of the uterine mucous membrane with iodine or other remedies.

The condition may ensue from developmental defects in the reproductive organs (such as lack of an opening in the hymen) or from scars of the vagina or cervix uteri following trauma. Menstrual blood accumulates in the vagina, uterus, and uterine tubes and then cannot be expelled from the body; this is known as false amenorrhea.

Frequently amenorrhea produces no marked subjective disorders, but severe cases may lead to metabolic changes (adiposis or sometimes loss of weight), depression, or unpleasant sensations such as congestion or vertigo.

Finding proper treatment requires determination of the basic causes of the condition, and treatment is directed toward elimination or mollification of the causes. Effective diet, long rest periods in the fresh air, climatotherapy, and therapeutic exercises are the prescribed forms of therapy. Emotional disturbances should be removed. Hormone preparations are frequently prescribed.

REFERENCES

Vikhliaeva, E. M. “K voprosu gormonoobrazovatel’noi funktsii iaichnikov u zhenshchin v klimaktericheskom periode.” In Fiziologiia i patologiia menstrual’noi funktsii. Moscow, 1960.
Kvater, E. I. Gormonal’ naia diagnostika i terapiia ν akusherstve i ginekologii, 3rd ed. Moscow, 1967. “Osnovnye formy anomalii menstrual’noi funktsii.” In Osnovy en-dokrinologicheskoi ginekologii. Moscow, 1966.

A. L. KAPLAN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

amenorrhea

[¦ā‚men·ə′rē·ə]
(medicine)
Absence of menstruation due to either normal or abnormal conditions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
* Women are protected from pregnancy for the first six months after a birth when they breast-feed exclusively and are amenorrheic. Women using the lactational amenorrhea method are expected to switch to another family planning method when they reach six months postpartum (or before that date, if they stop breast-feeding exclusively or start their menses).
Amenorrheic athletes are also at risk for the "female athlete triad"--disordered eating, amenorrhea, and osteoporosis.
Decreased nitric oxide levels and bone turnover in amenorrheic athletes with spinal osteopenia.
The reasons may be their relatively higher exposure to the risk of intercourse (longer duration of marriage), and lower incidence of postpartum infecundity (shorter duration of postpartum amenorrheic variables, i.e., MOBF, FBI, LCBI).
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Muscle performance in amenorrheic versus eumenorrheic and male ballet dancers.
It has been suggested that the decrease in bone mass in amenorrheic athletes may be permanent (Braam, et al., 2003; Keen and Drinkwater, 1997) and it is not yet clear whether the skeletal deficits can be reversed, due to a lack of longitudinal research.
All of those with hypothalamic amenorrhea were 90%-110% of ideal body weight; had been amenorrheic for at least 3 months; had normal FSH, prolactin, testosterone, and free testosterone levels; an LH-to-FSH ratio of less than 2.5; absence of hirsutism; and no history of an eating disorder.
Prolactin levels have also been found to be lower in amenorrheic athletes.
Also excluded were amenorrheic women and pregnant female students.
To protect you from these problems, many doctors now recommend that dancers who are amenorrheic should undergo low-dose estrogen replacement therapy.
* At the time of interview, women who were pregnant or postpartum amenorrheic for less than 24 months were classified according to the intention status of their last pregnancy or birth.