[A comparative in vitro culture study of the action of the chick embryo testis and testosterone on different target organs (author's transl)].

This is a survey of previously published data and some new ones. The target organs studied were chick and mouse wolffian ducts and mullerian ducts. The following statements can be made: 1. The anti-mullerian hormone of the chick embryo testis is active on both the avian and mammalian mullerian ducts. Testosterone on the contrary will stimulate them. 2. Testosterone will stimulate both the avian and mammalian wolffian ducts, the chick embryo testis will not. It is concluded that there is no testosterone secretion by the chick embryo testis or in too low a quantity to be effective. Thus, the chick embryo testis and testosterone exert quite different actions on all four target organs studied.