French L R, Rutledge J J, First N L
J Reprod Fertil. 1979 Sep;57(1):59-60. doi: 10.1530/jrf.0.0570059.
Litter size increased (P less than 0.01) as the age of the dam at farrowing increased. However, previous reproductive experience (parity) had no direct effect on litter size of dams of the same age.
随着分娩时母鼠年龄的增加，窝仔数增加（P<0.01）。然而，先前的繁殖经历（胎次）对同龄母鼠的窝仔数没有直接影响。
