Teen pregnancy: trends and lessons learned.
Boonstra
Heather
H
D000293:Adolescent; D002170:Canada; D003219:Confidentiality; D003267:Contraception; D005060:Europe; D005260:Female; D005544:Forecasting; D006297:Health Services Accessibility; D006801:Humans; D007086:Illegitimacy / Q000706:statistics & numerical data / Q000639:trends; D008297:Male; D011247:Pregnancy; D011253:Pregnancy in Adolescence / Q000706:statistics & numerical data; D011640:Public Policy; D014481:United States