Studies on the internal secretions of the ovary

Studies on the internal secretions of the ovary

“…This is in keeping with the previous work (34,35) showing that the aestrus-inhibiting action of the persistent corpora lutea which normally overrides the aestrus-promoting stimulus during pregnancy and lactation can in turn be overridden by the injection of excessive amounts of cestrin'. We thus arrive at the conception of the alternating dominance, in the complete fertile (38,39) enter into the mechanism of cestrus production and inhibition.…”

STUDIES CONCERNING THE MECHANISM CONTROLLING THE INITIATION OF LACTATION AT PARTURITION I. CAN ESTROGEN SUPPRESS THE LACTOGENIC HORMONE OF THE PITUITARY?1,2

“…As proof for this theory Nelson offered evidence that large dosages of estrogen can inhibit lactation, at least temporarily, in lactating guinea pigs. Other in' vestigators have also claimed that estrogen, when administered in large quantities, can either diminish or completely suppress lactation in various animals: the mouse (14,15,16), the rat (17,18,19), the goat (20), and the cow (21,22,23). In addition, estrogens (particularly diethylstilbesterol) and testosterone propionate have been used extensively to inhibit lacta' tion in postpartum women (24)(25)(26)(27)(28)(29)(30)(31)(32)(33).…”

The variation in the unit of the œstrus‐producing hormone

“…It was interesting to note that in several rats cestrus appeared within two days, but never more than two days, after ovariectomy. 4. The cestrus-producing hormone used.…”