Parity number, litter size and d1-calculated weight. Parity number, litter size and d1-calculated weight according to weaning age in F3 (A) and F4 generations (B). Statistically significant differences between d16 and d26 rats are indicated by (*) for P <0.05 with a two-way t-test, and (&) for P <0.03. Mean ± SEM, n = 3 mothers per group.
Crispel et al. BMC Medicine 2013 11:114 doi:10.1186/1741-7015-11-114