A retrospective analysis of 400 twin and 14 triplet pregnancies at the Department of Obstetrics and Perinatology, University School of Medicine in Lublin, from January 1, 1989 to June 30, 1999 was undertaken. A number increase of multiply pregnancies was observed--from 124 in the period 1989-1992 to 181 in the period 1996-1999. A percentage increase of cesarean sections was observed--from 52.42% to 77.34% respectively. The most frequent indications for the cesarean sections were non-vertex presentation of the first twin, threatened intrauterine infection and threatened intrauterine asphyxia.