Married and unmarried couples.
Bachrach
C A
CA
Horn
M C
MC
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004243:Divorce; D004522:Educational Status; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage; D012725:Sexual Behavior; D012959:Socioeconomic Factors; D014481:United States