Table 1.

Body mass, total litter size at birth, litter weight at birth, and mean birth weight per pub of the mouse generations used in this study.

	Generation number	Body mass at day 63 (g)		Total litter size at birth		Litter weight at birth (g)		Mean birth weight per pub (g)
		n	Mean ± s.d.	n	Mean ± s.d.	n	Mean ± s.d.	n	Mean ± s.d.
ctrl	192	310	31.0 ± 2.9	119	11.3 ± 2.9	119	19.8 ± 4.7	119	1.79 ± 0.2
FL1	191	114	35.2 ± 3.2	55	21.0 ± 4.0	55	36.9 ± 5.0	55	1.79 ± 0.2