Abstract
Several groups of immature rats were used to determine the effect of ZnSO4 in the augmentation of ovarian weights. In combination with Antuitrin S and given intraperi-toneally, the ovaries were significantly larger than in similar rats without ZnSO4. The ZnSO4 had no effect when injected subcut. and the Antuitrin S intraperi-toneally. Some increase in ovarian weight was obtained by doubling the dose of Antuitrin S, much more by doubling the amt. of implanted pituitary tissue, and the greatest effect of all when Antuitrin S was given with pituitary implants. Neither proteins as represented by thyroid tissue nor ZnSO4 had any effect on the results obtained with pituitary grafts.

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