THE FOETAL DEVELOPMENT OF THE HYPOTHALAMIC-HYPOPHYSIAL NEUROSECRETORY SYSTEM OF THE COW EMBRYO

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Abstract
The authors, using the aldehyde-fuchsin method of Gomori, established the 1st appearance of neurosecretory substance (n.s.s.) in the fetal life of the cow. At the gestational age of 3 months, visible granular substance was noted in the magno-cellular nucleic cells of the hypo-thalamus and in the neural stalk of the neurohypophysis. The aldehyde-fuchsin positive granulation became more apparent in the later stage of development.