Modified Naegele's rule for determination of the expected date of delivery irrespective of the cycle length

ABSTRACT

The present study included a total number of 750 pregnant females, 300 cases were studied retrospectively and 450 cases were studied prospectively. Different clinical parameters were assessed in relation to the determination of the duration of pregnancy. The length of the menstrual cycle had been the most significant parameter in relation to the duration of pregnancy. In using Naegele's rule, it is suggested that the menstrual history should be taken in proper consideration, though a correction value to the classic Naegele's rule was advised to overcome the error found in the actual day of deliveries