The relative efficacy of bed rest, cervical suture, and no treatment in the management of twin pregnancy.

We compared 60 twin pregnancies treated by bed rest, 37 treated by cervical suture and 36 receiving no active treatment. The incidence of the spontaneous onset of labour before 36 weeks of gestation, the mean gestational age at delivery, mean birth weights of the first and second twins and the incidence of 'small-for-dates babies' were similar in all three groups.