Demographic and perinatal characteristics at the time of the second delivery were similar among women with spontaneous onset of labor and women with no trial of labor (Table1). Women who underwent induction without prostaglandins were more likely than women who did not have a trial of labor to deliver infants whose estimated gestational age was more than 42 weeks. Women who underwent prostaglandin induction were less likely to deliver within two years of their first delivery and more likely to delivery at a level II hospital than women who had no trial of labor. The frequency of medical conditions and complications of pregnancy varied substantially among the groups (Table2). Women who had spontaneous onset of labor were significantly less likely than women with no trial of labor to have diabetes mellitus, chronic hypertension, preeclampsia , a breech presentation, genital herpes, or placenta previa. Women with induction without prostaglandins were significantly less likely than women who did not undergo labor to have breech presentation, genital herpes, or placenta previa. Finally, women with prostaglandin induction were significantly less likely to have breech presentation or genital herpes than women who did not undergo labor.