steroidogenic cells in the corpus luteum of the ferret ( mustela putorius ) during early ( days 6 and 13 ) to midpregnancy ( day 24 ) were characterized using electron microscopy , immunocytochemical localization of neurophysin , and smears of dispersed cells obtained by dissociating luteal cells with collagenase .
C0010092
corpus luteum
C0024156
luteal cells