[Action of testicular graft on the ovary of chick embryo having undergone a partial decapitation].

The absence of the hypothalamo-hypophyseal complex had neither influence on the ovarian atrophy, nor on the mullerian retrogression induced by an embryonic testicular graft in the female embryo. So, the hormone responsible of the mullerian retrogression had an inhibiting action on the embryonic ovary of the chick which is independant of the hypothalamo-hypophyseal complex.