fsh , lh and prolactin ( prl ) in pituitary tissues and fsh , lh , prl , estradiol ( e2 ) and progesterone ( prg ) in plasma were determined during pregnancy ( 1,2 and 3-week ) , at paturition ( 0 to 12 hours after parturition ) and during lactation ( 1,2,3,4,5 and 6-week ) .
C0033308
progesterone
C0032961
pregnancy