Table 4.

The concentration of IGF1 in the ovarian follicles of laying hens

	HLR1	MLR2	LLR3	P value
SWF, ng/mL	2.15 ± 0.14a	1.86 ± 0.19a,b	1.51 ± 0.14b	0.026
LWF, ng/mL	1.40 ± 0.15	1.25 ± 0.09	1.11 ± 0.11	0.252
SYF, ng/mL	1.78 ± 0.10	1.60 ± 0.07	1.52 ± 0.14	0.220
DF, ng/mL	3.21 ± 0.49a	3.11 ± 0.37a,b	2.23 ± 0.17b	0.049

Data were presented as mean ± SD (N = 6–8).

^a,bMeans with different superscripts within the same line differ significantly, P < 0.05.

¹HLR, hens with high laying rate (laying rate > 85%).

²MLR, hens with intermediate laying rate (60% < laying rate < 85%) from 90 to 94 wk of age.

³LLR, hens with low laying rate (laying rate < 60%).