Inan 1997.

Methods	Randomly assigned.
Participants	78 pregnant women (group I: 48, group II: 30) Inclusion criteria: 13‐24 weeks gestation, Bishop score <4. Exclusion criteria: none described.
Interventions	Group I:  extra‐amniotic ethacridine lactate (Rivanol). A No 16 Foley catheter was placed into the uterus. Following inflammation of the balloon of the catheter to 20‐30 ml, an average of 10 ml of 0.1 % sterile ethacridine lactate solution per gestational week was instilled extra‐amniotically. The catheter was left in place for 24 hours, if not expelled earlier. Group II: 2.5 ml gel containing 0.5 mg PGE2, intracervical (Cerviprost 0.5 mg gel Organon). Group III: extra‐amniotic ethacridine lactate combined with oxytocin infusion. 10‐20 units/5% DW IV oxytocin induction was started within 2‐4 hours following the ethacridine lactate instillation. For analyses, we did not include group III.
Outcomes	Successful abortion rates, side‐effects.
Notes	Definition of abortion: Complete evacuation of fetus and placental tissues from the uterus within 24 hours. No major complications described.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	B ‐ unclear
Blinding? All outcomes	High risk
Free of other bias?	Low risk	No statistically significant differences between the groups in terms of maternal age, gestational age and parity.