Prevalence and Incidence of Amenorrhea

Prevalence/Incidence of Amenorrhea: Online Medical Books

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Amenorrhea: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Amenorrhea is normal before puberty, after menopause, or during pregnancy and lactation; it’s pathologic at any other time. It usually results from anovulation due to hormonal abnormalities, such as decreased secretion of estrogen, gonadotropins, luteinizing hormone, and follicle-stimulating hormone; lack of ovarian response to gonadotropins; or constant presence of progesterone or other endocrine abnormalities.

Amenorrhea may also result from the absence of a uterus, endometrial damage, or from ovarian, adrenal, or pituitary tumors. It’s also linked to emotional disorders and is common in patients with severe disorders, such as depression and anorexia nervosa. Mild emotional disturbances tend merely to distort the ovulatory cycle, while severe psychic trauma may abruptly change the bleeding pattern or may completely suppress one or more full ovulatory cycles. Amenorrhea may also result from malnutrition, intense exercise, and prolonged hormonal contraceptive use. The incidence of primary amenorrhea in the United States is less than 1%. The incidence of secondary amenorrhea (due to some other cause than pregnancy) is about 4%.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

About prevalence and incidence statistics:

The term 'prevalence' of Amenorrhea usually refers to the estimated population of people who are managing Amenorrhea at any given time. The term 'incidence' of Amenorrhea refers to the annual diagnosis rate, or the number of new cases of Amenorrhea diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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