title: WHO launches a new method to study adolescents' sexual behaviour.
mesh_terms: D000293:Adolescent; D003906:Developing Countries; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D012725:Sexual Behavior; D014944:World Health Organization