to test this hypothesis , the numbers and sizes of large and small luteal cells , fibroblasts , capillary endothelial cells , and pericytes were determined in corpora lutea collected 12 , 24 , or 36 h ( 6 animals/group ) following administration of pgf2 alpha on day 10 postestrus and from untreated ewes on days 10 and 12 postestrus .
C1135970
small luteal cells
C0010092
corpora lutea