Evaluation of sonographic observation of distal femoral epiphyseal ossification center in the third trimestre of pregnancy

ABSTRACT

Observation of ossification centre of distal femoral epiphisis in fetus by ultrasonography can be used to estimate the gestational age. To find the observation percentage of ossification center of fetal distal femoral epiphysis by sonography in pregnant women between 29-40 weeks of pregnancy. A total number of 395 women between 29-40 weeks of pregnancy were examined by sonography in Kerman University hospitals [1998-1999]. The mean gestational age to observe this centre was 34.1 weeks with 3.5 weeks standard deviation. Gestational age was significantly correlated with appearance percentage of ossification center of distal femoral epiphysis [p <0.001]. The center was visible in all fetuses from 36th week afterwards, and in 58.8% it was seen in 29th week of gestational age. The findings indicate earlier appearance of distal femoral epiphysis of fetus comparing other studies