ABSTRACT
Pregnancy can affect on sleep pattern. About 2/3 of pregnant women complain of their sleep pattern. Besides having physical and psychological outcomes, the pattern can influence on labor and the type of delivery. This cohort study was conducted to determine the relation between sleep disorders in the last month of pregnancy and the type of delivery. 139 subjects [59 women without sleep disorders and 85 with sleep disorders] were selected by sequential sampling method and followed until their delivery. A questionnaire, an observation form and a checklist were used for data collection. Findings indicated that the chance of Cesarean section in women with sleep disorders were 2.7 times more than the other group [CI=0.83-8.5, RR = 2.7]. However, Qui-square test showed no significant difference between the groups [p= 0.096]. Sleep disorders have no effect on increasing Cesarean prevalence