Drickamer L C
J Reprod Fertil. 1976 Mar;46(2):369-74. doi: 10.1530/jrf.0.0460369.
The relationships between the size and sex composition of the litter and puberty in female mice were investigated. Both factors significantly affected the age of first vaginal oestrus; litter size accounted for 22% of the total variation in age at puberty, and litter sex composition for 8%. When no males or only one male was present in litters of 10 young the females matured significantly earlier than when two or more males were present.
研究了雌性小鼠窝仔数和性别组成与青春期之间的关系。这两个因素均对首次阴道发情的年龄有显著影响；窝仔数占青春期年龄总变异的22%，窝仔性别组成占8%。在一窝10只幼崽中，若没有雄性或只有一只雄性时，雌性小鼠成熟显著早于有两只或更多雄性的情况。
