the levels of 19-oh-a and e1 increased significantly as gestation progressed [ 19-oh-a ; 224.7 +/- 72.1 ( 1st trimester ) , 655.5 +/- 325.4 ( 2nd trimester ) . 1517.8 +/- 543.6 ( 3rd trimester ) pg/ml ] , and a positive correlation was found between the levels of the two steroids .
C0032961
gestation
C0032981
3rd trimester