Ngai 2000.

Methods	Randomisation schedule as described by Meinert. Sealed envelopes with serial numbers were prepared. At enrolment, a serial number was given according to the sequence of entry.
Participants	139 pregnant women (group I: 70, group II: 69) Inclusion criteria: healthy women between 16‐35 years, 14‐20 weeks gestation. Exclusion criteria: regular use of prescription drugs, IUD in utero, nursing mothers, multiple pregnancies, heavy smokers.
Interventions	All: 200mg mifepristone + (36 ‐ 48 h later): Group I: 400 μg misoprostol oral and a vaginal placebo (vitamin B6) every 3 hours; Group II: 200 μg misoprostol vaginally and an oral placebo (vitamin B6) every 3 hours.
Outcomes	Primary outcome: abortion within 24 hours. Secondary outcomes: induction to abortion interval, side‐effects.
Notes	Definition of abortion: not specified. If the placenta was incomplete, an evacuation of the uterus was carried out under general anaesthesia. No major complications occurred.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ adequate
Blinding? All outcomes	Low risk	Blinding for participants.
Free of other bias?	Unclear risk	No statistically significant differences between the groups in terms of maternal age and gestational age.