Placental thickness and Trans cerebellar diameter in the second trimester for accurate estimation of gestational age (A cross sectional study)

Abstract

he human placenta plays the main role in supplying the fetus with nutrients and oxygen. Sufficient delivery of those essentials from the mother to the fetus through normally developed placenta guarantees healthy development of the fetus. The measurement of placental thickness is relatively simple and clinically useful. Abnormal thickness of placenta is well recognized as a diagnostic harbinger in a wide spectrum of pathologic events. Placental thickness can contribute to the management of fetus at risk placental thickness measurement, in relation to gestational age can differentiate normal from abnormal pregnancy. The cerebellum is normally dumb bell shaped in fetal sonographic views and composed of 2 cerebellar hemispheres connected centrally by a triangular-shaped vermis. Suboccipitobregmatic view is used for TCD measurement. Second trimester measurement of TCD is in millimeters and is numerically equivalent to gestational age weeks. Transcerebellar diameter measurement is a very crucial parameter in estimating and calculating the gestational age of fetuses better and even more precise than other fetal biometric measurements (BPD, HC, AC, FL) which are routinely used in pregnant women with no medical disorders