Freeman E W, Rickels K, Mudd E B, Huggins G R
Am J Public Health. 1982 Aug;72(8):815-22. doi: 10.2105/ajph.72.8.815.
Four hundred urban Black teenagers enrolling in a family planning program before pregnancies occurred were followed for one year to assess factors influencing continuation of contraceptive use. Over half the follow-up respondents claimed to always use contraception. Program discontinuers were less likely to use contraception, but nearly half had no sex activity when contacted at follow-up. Sex frequency reported in the sample was low. Background factors of age, grade, and household were associated with contraceptive use and with pregnancy. Girls who had pregnancies were significantly more likely to live in a single-parent household, to have sex more frequently, and to have stated at enrollment that they wanted their first child before age 20. A majority of the sample, nearly all of whom obtained oral contraception, did not know at the one year follow-up how to use any alternative methods for preventing conception, hence many would again be at risk of pregnancy when sex activity resumed.
四百名在怀孕前参加计划生育项目的城市黑人青少年被跟踪了一年,以评估影响避孕措施持续使用的因素。超过一半的随访受访者声称总是采取避孕措施。退出项目的人使用避孕措施的可能性较小,但近一半人在随访时没有性行为。样本中报告的性行为频率较低。年龄、年级和家庭等背景因素与避孕措施的使用及怀孕情况有关。怀孕的女孩更有可能生活在单亲家庭中,性行为更频繁,并且在登记时表示希望在20岁之前生育第一个孩子。样本中的大多数人(几乎所有人都获得了口服避孕药)在一年随访时不知道如何使用任何其他避孕方法,因此当性行为恢复时,许多人将再次面临怀孕风险。