Valentine B H
Br J Obstet Gynaecol. 1977 Nov;84(11):846-54. doi: 10.1111/j.1471-0528.1977.tb12506.x.
A clinical trial involving 60 patients was conducted to assess the relative efficacy of intravenous oxytocin and oral prostaglandin E2 in ripening the unfavourable cervix, when given as a priming dose on the day before induction of labour. There was significant improvement in the Bishop score, and the subsequent induction-delivery interval following priming with prostaglandin. This improvement appeared to be dose-related.