Nielsen 1975.

Methods	Randomisation.
Participants	32 pregnant women (group I: 16, group II: 16) Inclusion criteria: gestation more than 14 weeks. Exclusion criteria: none reported.
Interventions	Group I: suprapublical/transvaginal injection of 20% saline, preceded by removal of 50 mL of amniotic fluid. Amount of saline depending on gestation; 14th week 75 mL, 15th week 100 mL, >16th week 150 mL. Group II: suprapublical/transvaginal injection of 40 mg of PGF2α, preceded by removal of 50 mL of amniotic fluid. Both groups received an 10 IU/h oxytocin drip (100IU in one litre of 5% glucose) within half an hour. If abortion did not occur before 200IU oxytocin was given, the infusion was stopped for 6‐8h and then restarted. PG/saline injection was not repeated.
Outcomes	Abortion interval, complications, side‐effects.
Notes	Definition of abortion: none given. Curettage was performed in cases which were considered incomplete. 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 apparant differences between the groups in terms of maternal age, gestational age and parity.