mothers were excluded from the study. Maternal
parameters including age, weight, height,
gestational age, number of pregnancies, number of
abortions, number of deliveries, socio-economic
status and the history of obstetric and gynecologic
diseases, and fetal parameters including sex, birth
height and weight and also placental parameters
including size and weight were recorded in the
information form. The study was approved by the
ethics committee of Zahedan University of Medical
Sciences (No: 91-911) and written informed
consent was obtained from all participants