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The following remarks are based on original investigation in the human and in the lower animals, especially the pig. The research embraces the examination of about 1,000 specimens of the genitals of the human and lower animals in various conditions and stages of development. The investigation was carried to the bird family, and some interesting information was gained. The development of the genito-urinary organs is one of the most fascinating of all studies, as the plans of evolution are most perfectly manifested in rapid succession. As the organs develop, the subjects of hypertrophy and atrophy are seen in their most typical forms. It is plain that in the embryo whole ages of evolutionary development take place in a few weeks, and that each of the distinct stages of the then distinct kidneys of mammals represent so many wide periods of animal life. The economy and conservatism of nature is shown
ROBINSON FB. ORIGIN AND DEVELOPMENT OF THE GENITOURINARY ORGANS IN WOMEN. Read in the Section of Obstetrics and Diseases of Women, at the Forty-fourth Annual Meeting of the American Medical Association. JAMA. 1893;XXI(13):459–463. doi:10.1001/jama.1893.02420650025001g
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