Estrogen excretion by a pregnant woman with an ileostoma

The low values of urinary estrogen excretion in a woman who was finally delivered of a well-developed child with a normal weight could be explained by the loss of estrogens via an ileostoma. The patient had undergone a total colectomy some years before because of colitis ulcerosa. Our observations give information about the extent and localization of the enterohepatic circulation of estrogens.