^ abVogel M, McGavack TH, Mellow J (April 1949). "The effects of various estrogenic preparations; changes in the vaginal mucosa and general status of climacteric women following the injection of aqueous suspensions of estrone and estradiol". Am. J. Obstet. Gynecol. 57 (4): 682–91. doi:10.1016/0002-9378(49)90707-3. PMID18124553.
^Vogel M, McGavack TH, Mellow J (July 1949). "The effects of various estrogenic preparations; the influence of equivalent amounts of several estrogens on the vaginal mucosa of nonmenstruating women". Am. J. Obstet. Gynecol. 58 (1): 147–52. doi:10.1016/0002-9378(49)90017-4. PMID18151173.
^ abBrown WE, Bradbury JT (August 1949). "The use of the human vaginal smear in the assay of estrogens". The Journal of Clinical Endocrinology and Metabolism. 9 (8): 725–35. doi:10.1210/jcem-9-8-725. PMID18133489.
^ abJensen, E. V. (1962). "Basic Guides to the Mechanism of Estrogen Action". Recent Progress in Hormone Research. Vol. 18. Academic Press. pp. 387–414.
![Mean vaginal cornification (grade) with a single subcutaneous injection of estrone or estradiol in aqueous suspension in around 10 women each.[1][2] Vaginal cornification grade is percentage cornification of vaginal epithelial cells and is 1 (+) = 10–25%, 2 (++) = 25–50%, and 3 (+++) = 50–75%.[1]](//upload.wikimedia.org/wikipedia/commons/thumb/d/d4/Vaginal_cornification_with_a_single_subcutaneous_injection_of_estrone_or_estradiol_in_aqueous_suspension_in_women.png/260px-Vaginal_cornification_with_a_single_subcutaneous_injection_of_estrone_or_estradiol_in_aqueous_suspension_in_women.png)
Mean vaginal cornification (grade) with a single subcutaneous injection of estrone or estradiol in aqueous suspension in around 10 women each.[1][2] Vaginal cornification grade is percentage cornification of vaginal epithelial cells and is 1 (+) = 10–25%, 2 (++) = 25–50%, and 3 (+++) = 50–75%.[1]![Mean change in vaginal smear test grade with different doses of estradiol pivalate (Estrotate) and estrone (Theelin-In-Oil) in oil solution by intramuscular injection in 10 to 20 women each.[3] Vaginal smear test grades were 1 = atrophic, 2 = intermediate cells, 3 = early cornification, 4 = full cornification.[3]](//upload.wikimedia.org/wikipedia/commons/thumb/8/86/Vaginal_changes_with_estradiol_pivalate_and_estrone_in_oil_solution_by_intramuscular_injection_in_women.png/259px-Vaginal_changes_with_estradiol_pivalate_and_estrone_in_oil_solution_by_intramuscular_injection_in_women.png)
Mean change in vaginal smear test grade with different doses of estradiol pivalate (Estrotate) and estrone (Theelin-In-Oil) in oil solution by intramuscular injection in 10 to 20 women each.[3] Vaginal smear test grades were 1 = atrophic, 2 = intermediate cells, 3 = early cornification, 4 = full cornification.[3]![Distribution of estrogen radioactivity (dpm/mg tissue or dpm/5 μL blood) in blood and tissues after a subcutaneous injection of 0.10 μg [3H]6,7-estradiol or 0.11 μg [3H]6,7-estrone in aqueous solution in rats.[4] At 2 hours uterine radioactivity with tritiated estrone was about one-tenth that of tritiated estradiol and almost all of the uterine radioactivity was estradiol.[4]](//upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Distribution_of_estrogen_radioactivity_after_a_subcutaneous_injection_of_tritiated_estradiol_or_estrone_in_aqueous_solution_in_rats.png/300px-Distribution_of_estrogen_radioactivity_after_a_subcutaneous_injection_of_tritiated_estradiol_or_estrone_in_aqueous_solution_in_rats.png)
Distribution of estrogen radioactivity (dpm/mg tissue or dpm/5 μL blood) in blood and tissues after a subcutaneous injection of 0.10 μg [3H]6,7-estradiol or 0.11 μg [3H]6,7-estrone in aqueous solution in rats.[4] At 2 hours uterine radioactivity with tritiated estrone was about one-tenth that of tritiated estradiol and almost all of the uterine radioactivity was estradiol.[4]![Mean vaginal cornification (grade) with a single subcutaneous injection of estrone or estradiol in aqueous suspension in around 10 women each.[1][2] Vaginal cornification grade is percentage cornification of vaginal epithelial cells and is 1 (+) = 10–25%, 2 (++) = 25–50%, and 3 (+++) = 50–75%.[1]](/wiki/File:Vaginal_cornification_with_a_single_subcutaneous_injection_of_estrone_or_estradiol_in_aqueous_suspension_in_women.png)
![Mean change in vaginal smear test grade with different doses of estradiol pivalate (Estrotate) and estrone (Theelin-In-Oil) in oil solution by intramuscular injection in 10 to 20 women each.[3] Vaginal smear test grades were 1 = atrophic, 2 = intermediate cells, 3 = early cornification, 4 = full cornification.[3]](/wiki/File:Vaginal_changes_with_estradiol_pivalate_and_estrone_in_oil_solution_by_intramuscular_injection_in_women.png)
![Distribution of estrogen radioactivity (dpm/mg tissue or dpm/5 μL blood) in blood and tissues after a subcutaneous injection of 0.10 μg [3H]6,7-estradiol or 0.11 μg [3H]6,7-estrone in aqueous solution in rats.[4] At 2 hours uterine radioactivity with tritiated estrone was about one-tenth that of tritiated estradiol and almost all of the uterine radioactivity was estradiol.[4]](/wiki/File:Distribution_of_estrogen_radioactivity_after_a_subcutaneous_injection_of_tritiated_estradiol_or_estrone_in_aqueous_solution_in_rats.png)
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