Table 5. Effects of feeding type and dietary energy level on hormone profiles of lactating sows during summer season

Item1)	Feeding type		Energy level (ME, kcal/kg)		SEM	p-value
	CF	FF	3,300	3,400		F	E	F × E
Post farrowing
FSH (ng/mL)	1.96	1.96	1.97	1.95	0.05	0.942	0.672	0.478
LH (ng/mL)	0.35	0.34	0.35	0.33	0.03	0.818	0.541	0.756
Insulin (uU/mL)	2.36	2.39	2.40	2.35	0.28	0.926	0.867	0.629
Cortisol (ug/mL)	8.17	8.02	8.25	7.94	0.39	0.695	0.435	0.925
Weanling
FSH (ng/mL)	2.73	2.80	2.74	2.79	0.12	0.597	0.733	0.984
LH (ng/mL)	0.63	0.67	0.64	0.66	0.05	0.438	0.633	0.911
Insulin (uU/mL)	1.40	1.58	1.45	1.53	0.10	0.074	0.506	0.870
Cortisol (ug/mL)	5.02	4.32	4.89	4.44	0.46	0.132	0.327	0.601

Data are means of seven replicates.
SEM, standard error of means; CF, conventional feeding; FF, free feeding; F, feeding type, E, dietary energy level, F × E, feeding type × dietary energy level.