Amenorrhea is the absense of menstrual periods. The term "primary amenorrhea" is used if periods have never started in females aged 16 or older. It is a rare gynecological disorder. Regular menstruation usually begins (menarche) within two years of the onset of puberty. Absence of menses by age 16-18 constitutes Primary Amenorrhea.
National Adrenal Diseases Foundation
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".
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