It seems that lack of growth follows the removal of and transplantation of ovaries in chickens. At the end of from six to twelve months the hens operated on are distinctly lighter than the controls. Also the eggs from the hens operated on weigh less than the eggs from the normal hens. As a rule, the weight of the egg and chick relative to the body weight is also less in the hens operated on.
During the second year both the actual weight of the egg and weight relative to the body weight in the hens operated on approach the normal.1
GUTHRIE CC. RESULTS OF OVARIAN TRANSPLANTATION ON BODY WEIGHT AND EGG WEIGHTS IN FOWLS.. JAMA. 1908;LI(16):1314. doi:10.1001/jama.1908.25410160024001g