Examined possible antecedents of premarital and marital conceptions early in lives of young women (n=5,167) and men (n=5,585). Found that significant antecedents of premarital conception for both sexes were low socioeconomic status; low adolescent social adjustment; and family environment characterized by parent-child arguing, parental divorce or separation, or family history of premarital fertility. (Author/NB)