[Considerations on the beginning of menstruation and on the frequency of menstrual disorders in Bulgarian women].
D005260:Female; D006801:Humans; D008598:Menstruation; D008599:Menstruation Disturbances / Q000706:statistics & numerical data*
MENSTRUATION; MENSTRUATION DISORDERS/statistics
Pruvaniia vurkhu poivata na purvata menstruatsiia i chestota na menstrualnite anomalii u nas.