primary amenorrhea

amenorrhea /amen·or·rhea/ (ah-men″o-re´ah) absence or abnormal stoppage of the menses.amenorrhe´al

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primary amenorrhea  failure of menstruation to occur at puberty.

secondary amenorrhea  cessation of menstruation after it has once been established at puberty.

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primary amenorrhea

n.

Amenorrhea in which menstruation has never occurred.

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primary amenorrhea.

See amenorrhea.

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primary amenorrhea

Gynecology The absence of any menstrual flow by age 16, which affects 2.5% in US; median age for menarche is ± age 12.3; PA may occur with or without other signs of puberty Etiology Normal delay of menarche; drastic weight loss–poverty, fad dieting, anorexia nervosa, bulimia, etc; congenital defects of genital system, hypoglycemia, extreme obesity, gonadal dysgenesis, Turner/XO syndrome, hypogonadotropic hypogonadism, testicular feminization, true hermaphroditism, chronic illness, malnutrition, Crohn's disease, cystic fibrosis, cyanotic congenital heart disease, craniopharyngioma, ovarian tumors, adrenal tumors, hyperthyroidism, imperforate hymen, vaginal and/or cervical absence, adrenogenital syndrome, Prader-Willi syndrome, polycystic ovarian disease, congenital adrenal hypoplasia. See Amenorrhea.