Illegitimate and premaritally conceived first births in Massachusetts, 1966-1968.
D000293:Adolescent; D000328:Adult; D001719:Birth Certificates; D001722:Birth Order; D005260:Female; D005306:Fertilization; D006801:Humans; D007086:Illegitimacy; D008393:Marriage; D008404:Massachusetts; D010298:Parity; D011247:Pregnancy