Table 1.

Maternal behavior

	C		S1		S2
	LF	HFS	LF	HFS	LF	HFS
In contact	3.71 ± 0.38	4.02 ± 0.65	4.48 ± 0.46	4.88 ± 0.90	5.97 ± 0.68	5.93 ± 1.19
Not in contact	34.99 ± 2.83	38.09 ± 2.08	37.18 ± 1.16	28.86 ± 3.02	34.64 ± 2.50	33.51 ± 2.15
Licking/grooming	2.73 ± 0.54	2.35 ± 0.39	2.60 ± 0.49	4.36 ± 0.96	3.49 ± 0.70	3.97 ± 0.67
Licking 1 pup	0.07 ± 0.04	0.08 ± 0.08	0.00 ± 0.00	0.19 ± 0.10	0.00 ± 0.00	0.09 ± 0.09
Split litter	0.47 ± 0.21	0.89 ± 0.64	0.25 ± 0.15	0.09 ± 0.07	0.34 ± 0.22	1.03 ± 0.53
Retrieving	0.17 ± 0.07	0.09 ± 0.04	0.00 ± 0.00	0.15 ± 0.06	0.02 ± 0.02	0.09 ± 0.09
Side Nursing	2.24 ± 1.19	0.16 ± 0.11	5.84 ± 5.50	12.67 ± 5.90	4.60 ± 2.25	1.30 ± 1.17
ABN1	1.41 ± 0.31	0.74 ± 0.18	2.79 ± 0.85	2.08 ± 0.49	1.47 ± 0.31	1.47 ± 0.38
ABN2	24.63 ± 4.02	22.28 ± 1.78	30.84 ± 5.30	24.49 ± 5.73	24.15 ± 4.37	27.77 ± 3.90
ABN3	22.75 ± 2.77	26.24 ± 1.72	13.55 ± 2.28	16.83 ± 1.56	18.97 ± 1.55	19.65 ± 1.90
ABN4	6.83 ± 1.81	5.05 ± 1.21	2.48 ± 0.62	5.39 ± 1.82	6.34 ± 1.63	5.18 ± 1.32

Values are expressed as means ± SE. Average percentage of maternal behaviors in control mice (C) and selected lines (S1, S2) feeding low-fat (LF) or high-fat sucrose (HFS) diet during first week after parturition (PND 1–7). ABN1–4, arched back nursing, day 1–4. We assessed maternal care during three periods (each 100 min) of observations per day at CT 3, 9, 13. The total number of observation per day was 75 (every 4 min for 100 min, three times a day). Within each observation period, the behavior of each dam was scored every 4 min for a total of 25 observations per period and a total of 75 observations per dam per day.