THE RELATION OF GONADAL CONDITION TO ERYTHROCYTE NUMBER IN FOWLS

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Abstract
The erythrocyte number was determined on 80 brown Leghorns, 40 [male] and 40 [female], at intervals from the day after hatching to 16 mos. of age. A definite sex dimorphism in the number of red cells was noted confirming other observations cited. The juvenile and the gonadectomised bird of either sex and the mature [female] all show a similar erythrocyte number. The number of red cells is significantly higher in the adult [male], the increase becomes apparent at the time of sexual maturity. Red counts (30) carried out in poulards show that the modifications in the [male] direction noted after removal of the left ovary can now be extended to include the erythrocyte number which equals that of the adult [male].

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