title: [Prevalence and etiology of secondary amenorrhea in a selected Mexican population].
abstract: Studies performed upon american and european population indicate that secondary amenorrhea is associated to 3 months without menses, despite biases observed in age variation and intervals of apparition; nonetheless a 3 month lapse is the standard of reference to quality patients within mexican females. Hence, we investigated the prevalence of secondary amenorrhea among all females (n = 1099) that consulted in our clinic, grouped by age (15-50 yrs), time (months) of amenorrea and identifying the etiology when possible. The prevalence observed was 4.9% with major incidence of 4-12 months of amenorrhea duration (x 5.7 months) between 26-35 years of age. The three most common causes in order of frequency were: Hypothyroidism (14.8%); hiperandrogenism (12.9%) and pituitary adenoma (11.1%). It is concluded that the prevalence of secondary amenorrhea in our study resembled that found in the literature, although in this instance primary hyperthyroidism was the leading cause.
authors.affiliation: Depto. de Biología de la Reproducción Humana, Hospital Juárez de México, SSA, México, D.F.
authors.forename: I
authors.initials: I
authors.lastname: Hernández
authors.forename: R
authors.initials: R
authors.lastname: Cervera-Aguilar
authors.forename: M D
authors.initials: MD
authors.lastname: Vergara
authors.forename: A R
authors.initials: AR
authors.lastname: Ayala
mesh_terms: D000236:Adenoma / Q000453:epidemiology; D000293:Adolescent; D000328:Adult; D000568:Amenorrhea / Q000453:epidemiology* / Q000209:etiology; D005060:Europe / Q000453:epidemiology; D005260:Female; D006801:Humans; D017588:Hyperandrogenism / Q000150:complications; D006980:Hyperthyroidism / Q000150:complications; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D010911:Pituitary Neoplasms / Q000150:complications / Q000453:epidemiology; D011159:Population Surveillance; D015995:Prevalence; D014481:United States / Q000453:epidemiology