Drickamer L C
Lab Anim. 1977 Jul;11(3):159-62. doi: 10.1258/002367777780936639.
Over a 4-year period a higher proportion of mated females bore litters during spring and summer than in late autumn and winter. Litter sizes were larger and young female mice weighed more at 21 days of age during spring and summer than at other times. However, young females attained sexual maturity, as indicated by vaginal smears, earlier during the winter months. This contrasts with data indicating that pubertal female mice have lower uterine weights in winter, A multiple regression analysis revealed that mouse bodyweights at 35 days of age and at 1st oestrus were important variables for predicting the age of puberty. Possible factors influencing reproductive seasonality in female house mice maintained under laboratory conditions are discussed.
在4年的时间里，交配过的雌性小鼠在春季和夏季产仔的比例高于秋末和冬季。春季和夏季的窝仔数更多，幼龄雌性小鼠在21日龄时的体重也比其他时期更重。然而，通过阴道涂片显示，幼龄雌性小鼠在冬季更早达到性成熟。这与表明冬季青春期雌性小鼠子宫重量较低的数据形成对比。多元回归分析显示，35日龄和首次发情时的小鼠体重是预测青春期年龄的重要变量。本文讨论了在实验室条件下饲养的雌性家鼠繁殖季节性的可能影响因素。
