however , since fetal weight increases with gestation , inulin space expressed as a percent of body weight actually decreased with gestational age ( r = -0.80 ) , so that at 120 days gestation the fetus would have an estimated inulin space of 59 % of body weight and at 145 days the fetus would have an inulin space of only 34 % of body weight .
C0751992
fetal weight
C0005910
body weight