A COMPARISON OF SONOGRAPHIC GROWTH-CURVES OF TRIPLET AND TWIN FETUSES

Sonographic growth curves of 47 normal triplet pregnancies were compar ed with those of 71 uncomplicated twin gestations. Starting from the 2 5th week, the biparietal diameter in triplets was found to lag progres sively compared with that of twins, reaching a mean difference of 2 we eks at 36 weeks gestation. Similarly, a significant difference was fou nd between the femur length and head to abdomen circumference ratio gr owth curves of triplets and twins. It is concluded that as pregnancy c ontinues from the 25th to the 36th gestational week, there is a signif icant delay in the growth patterns of normal triplet pregnancies compa red with twin gestations.