Inclusion Criteria:  Low risk women (nulliparous and multiparous). Pregnant women between 39 and 41+5 weeks of gestation. Singleton pregnancy. Aged 18 years or older. Intact fetal membranes at the time of recruitment. Unfavourable cervix (Bishop Score <6) The ability to understand and sign a written informed consent form, prior to participation in any screening procedures and must be willing to comply with all study requirements.  Exclusion Criteria:  Multiple pregnancy; Breech presentation; Contraindication to vaginal birth placenta praevia, transverse lie, known or suspected cephalo-pelvic disproportion; Rupture of membranes; Parity >3; Clinical evidence of fetal growth restriction, Fetal macrosomia (>95th centile or absolute weight >4.5kg); Presence of reduced fetal movements, abnormal CTG or recent antepartum haemorrhage. Medical conditions: (anaemia [<100g/l], liver disease, diabetes, preeclampsia, obstetric cholestasis, renal disease, cardiac disease or group B streptococcus carrier, sexually transmitted infections, bleeding disorders, on anticoagulants, steroid or aspirin therapy); prior uterine operations (Caesarean Section or myomectomy). Lives alone, >30 minutes from hospital, no personal transport to hospital. Contra-indications to mifepristone including chronic adrenal, hepatic, renal failure, Hypersensitivity to mifepristone or to any excipients, malnutrition severe asthma uncontrolled by therapy and inherited porphyria. Severe asthma uncontrolled by therapy and inherited porphyria