Introduction: The period of intrauterine development constitutes one of the most vulnerable phases in the life cycle, with a lasting profound influence on subsequent growth. It is universally acknowledged that size at birth is an important indicator of foetal and neonatal health. Size at birth is the product of duration of gestation and rate of foetal growth. to evaluate the growth pattern of abdominal circumference (AC) and femoral length (FL) of foetuses Assamese population, which is our local sample of population belonging to state Assam situating in the north-east part of country India