Anatomic distribution of ER and PgR in rabbit and dog uteri

Similar ER activities were observed in the different sections and in both branches of rabbit uterus, while PgR activities varied greatly from branch to branch and from section to section in the left branch of the uterus. The total ER activity was much higher than the total PgR activity in both branches. In the dog uterus, both ER and PgR showed higher activity in the right branch, but both appeared to be equally distributed in the sections and in each branch. The total ER and PgR activities were equally distributed in both branches.