Primary and Secondary Amenorrhea

摘要: Puberty represents a particular period of life characterized by hormonal changes and physical psychological modifications leading children from childhood to adolescence. During this period, menarche the most important event in females. Age is different among populations has been recognized as an useful marker socio-economic status, well dietary environmental patterns (Chumlea et al., 2003; Swenson & Havens, 1987; Thomas 2001). Generally, first menstrual cycle takes place between 12 13 years age, with 98% girls having 15 age (Diaz, 2006). The normal range for cycles 21 45 days, flow length varying 2 7 days (Flug 1984; World Health Organization Task Force on Adolescent Reproductive Health, 1986). after menarche, menses often abnormal due immaturity hypothalamic-pituitary-ovarian axis 2006); however, can be regular also gynecologic year Amenorrhea defined complete absence or anomalous cessation females during reproductive years. Just three situations amenorrhea considered physiological: pregnancy, lactation menopause. In all other situations, many pathological conditions merits careful assessment. classified primary secondary according its occurrence before respectively (The Practice Committee American Society Medicine, 2008). when does not occur 16 girl sexual development, 14 without development. disappear 6 consecutive months irregular 3 (Deligeoroglou 2010). According currently literature causes have 2008), including: • anatomic defects genital tract hypothalamic/pituitary ovary insufficiency endocrinopathies chronic oligoor anovulation