[Therapy of cervix insufficiency--cerclage or support pessary?]

To evaluate the efficiency of cerclage or pessary a prospective random study has been done from 1982 to 1983. Pelvic score of Bishop and tocolysis index of Baumgarten were used to define the situation at the beginning. Success has been estimated with help of neonatal parameters (birth weight, Apgar score and RDS-morbidity) and final gestational week. Both methods are equal in their effects.