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: ObjectiveTo compare signs and symptoms between patients with recurrent and single ectopic pregnancies.: DesignCase-control study.: SettingUniversity medical center.: Patient(s)Three hundred six women with single ectopic pregnancies and 61 women with recurrent ectopic pregnancies.: Intervention(s)None.: Main outcome measure(s)Risk factors, historical factors, and findings at presentation that may predispose to recurrent ectopic pregnancy.: Result(s)The risk of recurrent ectopic pregnancy was increased with a history of surgery, history of live birth, and history of spontaneous miscarriage and not with a history of gonorrhea, chlamydia, pelvic inflammatory disease, Caesarean section, or pregnancy termination. Patients with a recurrent ectopic pregnancy had a nonsignificant trend toward higher initial hCG values. The majority of ultrasounds in both groups were nondiagnostic on presentation. The patients with recurrent ectopic pregnancy were less likely to have bleeding on initial presentation, though both groups had similar complaints of pain.: Conclusion(s)Secondary prevention of ectopic pregnancy is problematic because of the paucity of risk factors that can be modified to diminish the odds of recurrence. Clinicians'' ability to both diagnose and counsel patients at risk for recurrent ectopic pregnancy can be optimized by awareness of the clinical features of this condition. [Copyright &y& Elsevier]

Objective: To evaluate the association between ectopic pregnancy (EP) and clinical and historical factors among women presenting with pain and/or bleeding in early pregnancy. Design: Nested case–control study. Setting: University medical center. Patient(s): Women with symptomatic early pregnancies of unknown location presenting for care between January 1, 1990 and July 31, 1999. Intervention(s): None. Main Outcome Measure(s): Clinical and historical risk factors were compared between women with EP and women with ongoing intrauterine pregnancies or spontaneous abortions. Result(s): The following factors were associated with increased risk of EP: prior EP (odds ratio, 2.98 [95% confidence interval, 1.88–4.73] for one prior EP and 16.04 [5.39–47.72] for 2 or more), pelvic inflammatory disease history (1.5 [1.11–2.05]), pain at presentation (1.42 [1.06–1.92]), vaginal bleeding at presentation (1.42 [1.04–1.93]), and hCG of 501–2,000 mIU/mL (1.73 [1.24–2.42]). Age younger than 25 years (0.59 [0.41–0.85]) and a history of abortion were protective from EP (0.58 [0.38–0.90]). Prior nontubal pelvic surgery, past intrauterine device use, prior cesarean section, and current cervical infection demonstrated no association with EP. Conclusion(s): Evaluation of women with a symptomatic early pregnancy confirms and refutes some of the classical risk factors for EP. Prior EP is a strong risk factor, whereas pelvic inflammatory disease has an unexpected weak association. Previous abortion was found to have a negative association, whereas nontubal surgery, cesarean section, and a history of or concomitant cervical infection have no association. Knowledge of historical and clinical factors associated with EP may aid in early diagnosis. [Copyright &y& Elsevier]