Sexual activity before the age of 16 years.
Nair
H
H
Oakeshott
P
P
D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D000328:Adult; D000367:Age Factors; D003075:Coitus / Q000523:psychology; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008019:Life Style; D008131:London; D008297:Male; D013337:Students, Medical / Q000523:psychology / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires