during ovarian stimulation plasma secretin correlated significantly with serum estradiol ( p less than 0.00001 ; r = 0.9333 ) , serum prl ( p less than 0.03 ; r = 0.6521 ) , and plasma vip ( p less than 0.03 ; r = 0.6534 ) .
C0229671
serum
C0032105
plasma