THE EFFECT OF LACTATION AND EXERCISE ON THE RATE OF INVOLUTION OF THE UTERUS IN THE RAT

Abstract
The uteri of 25 non-lactating and 39 lac-tating rats, receiving a standard died ad libitum, were weighed 16 days after parturition; the mean wt. of the latter group was 58% less than that of the former group. 31 non-lactating rats were exercised daily for 16 days after parturition; the mean wt. of the uteri was decreased only by 11% as compared with non-lactating-resting controls.

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