Labour induced in 46 women with a small balloon catheter was compared to 46 women induced with ‘normal balloon’ (Robinson's catheter with two condoms) and matched for age, parity, gestational age, marital status and ethnic origin with the aim of identifying a preferred induction method for middle trimester pregnancy. The retrospective study showed no differences in the duration of delivery, Pitocin, mode delivery, complications and effective rate. ‘Small balloon’ is simpler than ‘normal balloon’ and is a safe, reliable induction of labour method for mid-trimester pregnancy.
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