Boys: half the solution.
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Kin
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D000293:Adolescent; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006301:Health Services Needs and Demand; D006801:Humans; D008297:Male; D011247:Pregnancy; D011253:Pregnancy in Adolescence / Q000517:prevention & control*; D012573:School Nursing; D012736:Sex Education / Q000379:methods*; D012725:Sexual Behavior; D006113:United Kingdom