Pregnancy among high school students.
D000293:Adolescent; D000367:Age Factors; D001290:Attitude; D003075:Coitus; D003267:Contraception; D003380:Courtship; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007182:Income; D008572:Menarche; D011247:Pregnancy; D012572:School Health Services; D012725:Sexual Behavior; D013332:Student Dropouts; D013334:Students; D014861:Washington