共 50 条
- [1] AGE AT 1ST INTERCOURSE AMONG HOMELESS ADOLESCENT FEMALES [J]. JOURNAL OF PEDIATRICS, 1978, 93 (01): : 147 - 148
- [5] NUMBER OF SEXUAL PARTNERS AND AGE AT 1ST INTERCOURSE IN SUBSEQUENT GENERATIONS OF ITALIAN MALES AND FEMALES [J]. REVUE D EPIDEMIOLOGIE ET DE SANTE PUBLIQUE, 1993, 41 (01): : 59 - 64
- [6] AGE AT 1ST SEXUAL INTERCOURSE AND THE TIMING OF MARRIAGE AND CHILDBIRTH [J]. JOURNAL OF MARRIAGE AND THE FAMILY, 1991, 53 (03): : 719 - 732
- [9] PREGNANCY AFTER 1ST ACT OF INTERCOURSE [J]. JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 1951, 147 (14): : 1398 - 1398
- [10] 1ST INTERCOURSE AMONG YOUNG AMERICANS [J]. FAMILY PLANNING PERSPECTIVES, 1983, 15 (02): : 64 - 70