This article by Geoffrey Chamberlain and Luke Zander (10 April, pp 995-8) includes a diagram titled “Inserting prostaglandin gel into upper vagina” (p 997). In fact, the diagram shows the gel being incorrectly inserted into the upper endocervical canal, next to the fetal membranes. Such a mistake usually causes a hypertonic uterine contraction, which may produce fetal distress and other complications.