World Health Organization multicenter study on menstrual and ovulatory patterns in adolescent girlsII. Longitudinal study of menstrual patterns in the early postmenarcheal period, duration of bleeding episodes and menstrual cycles
- 1 July 1986
- journal article
- Published by Elsevier in Journal of Adolescent Health Care
- Vol. 7 (4) , 236-244
- https://doi.org/10.1016/s0197-0070(86)80015-8
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