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Hum. Reprod. Advance Access published online on July 21, 2005
Human Reproduction, doi:10.1093/humrep/dei196
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© The Author 2005. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved.
Received April 16, 2005
Accepted June 16, 2005

Article

A prospective randomized comparison of sublingual and oral misoprostol when combined with mifepristone for medical abortion at 12-20 weeks gestation

Oi Shan Tang 1*, Carina C.W. Chan 1, Anita S.Y. Kan 1, and Pak Chung Ho 1

1 Department of Obstetrics and Gynaecology, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China

* To whom correspondence should be addressed.
Oi Shan Tang, E-mail: ostang{at}graduate.hku.hk


  Abstract

BACKGROUND: Sublingual misoprostol has been shown to be effective in medical abortion. A prospective double-blinded placebo-controlled trial was done to compare the efficacy and side-effects of sublingual to oral misoprostol when used with mifepristone for medical abortion from 12 to 20 weeks gestation. METHODS: A total of 120 women at 12-20 weeks of gestation were randomized to receive 200 mg oral mifepristone followed by either sublingual or oral misoprostol 400 µg every 3 h for a maximum of five doses 36-48 h later. The course of misoprostol was repeated if the woman did not abort within 24 h. RESULTS: There was no significant difference (P= 0.43) in the success rate at 24 h [relative risk= 1.075; 95% confidence interval (CI): 0.94-1.19]. Abortion occurred in 91.4% in the sublingual group (95% CI: 81.0-96.7%) as compared to 85.0% (95% CI: 73.7-92.1%) in the oral group. The median induction-to-abortion interval was significantly shorter (P=0.009) in the sublingual group (5.5 h) as compared to the oral group (7.5 h). The incidence of fever was higher in the sublingual group (P < 0.0001). The incidences of other side-effects were similar. CONCLUSION: Sublingual misoprostol, when combined with mifepristone, is effective for medical abortion in the second trimester. The induction-to-abortion interval is shorter when sublingual misoprostol is used when compared to oral misoprostol.

Keywords: abortion/misoprostol/oral/second trimester/sublingual.
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[Abstract] [Full Text] [PDF]


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