Abstract
Summary
Estrogen induced extension of the duct system of mammary glands of suckling, ovariectomized, hooded Norway rats. Two μg of 17 β-estradiol dipropionate stimulated greater mammary growth than did 1.0 μg but 4.0 μg were not superior to 2 μg. Estrogen (0.5 μg) every other day plus progesterone (1.0 mg) daily stimulated greater mammary duct growth than did 2.0 μg of estrogen alone.
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