Estimation of Foetal cephalic index in Utero during various periods of Pregnancy by Ultrasonogram and their correlation to gestational age In the Garhwali population

Abstract

Estimation of the exact date of confinement by the obstetricians has been for a long time calculated by the Nagele's rule (LMP plus 7 days minus 3 months). Estimation of an accurate gestational age is essential by which an obstetrician will be successful in managing an antenatal patient. Many a times the patients do not remember their exact date of LMP. Estimation of gestationalage on the basis of measurement of the biparietal diameter by the ultrasonographic methods is being followed in most of the hospital.Various workers like Hadlock et al6, Berger et al2°, Dewhurst et a|2', Sabbagha eta| 23 Campbell 24, Parker et a| 26, Dubowitz and Goldberg et al 27, Okupe et a| 28, Varma 32 have observed the changes in the BPD at various gestational ages. They have also laid down the various table by which gestational age can be estimated by a given BPD.