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Issues to Consider When Engaging Muslim Youth in Psychiatric Care More...
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In females, changes in the primary sex characteristics involve growth of the uterus, vagina, and other aspects of the reproductive system. Menarche , the beginning of menstruation, is a relatively late development which follows a long series of hormonal changes.  Generally, a girl is not fully fertile until several years after menarche, as regular ovulation follows menarche by about two years.  Unlike males, therefore, females usually appear physically mature before they are capable of becoming pregnant.
In a major report WHO summarizes evidence-based adolescent health interventions and provides guidance on priority setting and programming. Additionally, 75 case studies from countries applying recommended programmes show the results of efforts to improve the health and well-being of adolescents.