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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Adolescent, Adolescent Behavior, Adult, Age Factors, California, Child, Contraception, Contraceptive Agents, Female, Humans, Logistic Models, Medical Records, Odds Ratio, Pregnancy, Pregnancy in Adolescence, Retrospective Studies.
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Adolescents' contraceptive use and pregnancy history: is there a pattern? Context: To examine the association between pregnancy experience and adolescents' contraceptive use. We conducted a retrospective study of 920 sexually active adolescents not desiring pregnancy. Adjusted multivariable logistic regression analyses were used to assess the explanatory value of previous birth and abortion as well as first pregnancy at presentation on contraceptive practice. Twenty-seven percent of the adolescents had been pregnant. Regardless of pregnancy history, 52% of adolescents used noneffective contraception (ie, condoms inconsistently or no method). Adolescents with previous abortion were three times (odds ratio [OR] 3.4, 95% confidence interval [CI]1.6, 7.3) more likely than never-pregnant adolescents to use hormonal contraception. However, although more likely to use contraceptive injections or implants, adolescent mothers were not more likely than never-pregnant adolescents to use oral contraceptives. Adolescents with prior abortion or birth were less than half (ORs 0.3 and 0.4, 95% CIs 0.2, 0.5 and 0.2, 0.6, respectively) as likely as never-pregnant adolescents to use condoms consistently.
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Previous pregnancy is associated with increased likelihood to use hormonal methods; however, a significant proportion of adolescents use noneffective methods and, thus, are at risk for repeat teenage pregnancies.