the per cent unbound p in m.p.v . plasma of pregnant patients at term was not different from that of nonpregnant patients but was 40 per cent lower than that in umbilical cord plasma ( p less than 0.01 ) , and the ratio between the concentrations of unbound p and estradiol in m.p.v . increased as pregnancy progressed .
C0014912
estradiol
C0032961
pregnancy