cytosolic and nuclear progesterone ( p ) and estrogen ( e ) receptors ( pr and er , respectively ) were measured in uterine tissues of rabbits at the end of pregnancy ( days 25 , 27 , 29 , 30 , and 31 and 0-10 h postpartum ) and pseudopregnancy ( days 13 and 18 ) .
C0014939
estrogen
C0032961
pregnancy