Study	Reason for exclusion
Arraztoa 1994	Compared, in women with a prior caesarean birth in spontaneous labour, a pharmacologic approach (oxytocin + epidural) to expectant management (spontaneous evolution). Did not compare methods of induction for women in whom labour was induced
Ben‐Aroya 2001	Not a RCT, but rather a cohort study
Hamdan 2009	Compared weekly membrane sweeping to weekly vaginal examination, did not compare 2 different methods of cervical ripening or induction. Women did not require induction of labour
Lelaidier 1994	Mifepristone was used as a pre‐induction agent, only after the women were randomised
Morales 1986	2‐arm quasi‐randomised trial comparing induction using oxytocin versus expectant management for women with a previous caesarean section
Ramya 2015	Compared weekly membrane sweeps from 39 weeks GA to no intervention/expectant management. The aim of the intervention was reducing post‐term pregnancies, not induction of labour
Rayburn 1999	Compared weekly administration of cervical PGE2 gel to expectant management in women with a prior caesarean birth, not 2 different methods of cervical ripening or induction. Women with indications for induction of labour were excluded
Sciscione 2001	Initially all women were included, subsequently women with a prior caesarean were excluded
Spallicci 2007	Women did not require induction of labour

GA: gestational age
 RCT: randomised controlled trial