Objective To compare the effectiveness, success rate and induction to abortion interval between administration of misoprostol only and mifepristone with misoprostol in second trimester abortions (14-20 weeks). Materials and methods The study was conducted by dividing women approaching for second trimester termination, into two groups each consisting of 100 women.Group-I received only misoprostol; 600 mcg initial vaginal insertion followed by 400 mcg sublingually every 3 h until termination. Women in Group-II received mifepristone 200 mg and after 24 h started with 600 mcg misoprostol, per vaginal followed by 400 mcg sublingually till abortion was completed, up to a maximum of five doses in both groups. Results The success rate in Group-I was 89 %, whereas in Group-II it was 96 %. The mean induction abortion interval in Group-I was 10.67 ± 3.96 h compared to Group-II which was significantly less 6.19 ± 2.70 h (p value \ 0.01). The mean dose of misoprostol in Group-I was 1610 ± 511.18 mcg and in Group-II, it was lesser 1046 ± 392.71 mcg (p value \ 0.01). There was significant difference in the mean blood loss also, 97.20 ± 36.35 ml in Group-I and 52.55 ± 27.96 ml in Group-II. Also among the individual groups multigravidae and lower gestational age (\17 weeks), women had lesser IAI as well as lesser misoprostol dose was required. 123Conclusion Pretreatment with mifepristone significantly reduces the induction abortion interval and the misoprostol dose along with minimal blood loss.

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