maternal plasma pyridoxal 5'-phosphate ( plp ) levels were positively correlated with vitamin b-6 supplementation at 30 weeks gestation ( r = 0.55 , p less than 0.0005 ) and at delivery ( r = 0.54 , p less than 0.01 ) .
C0034266
pyridoxal 5
C0087162
vitamin b-6