Table 4.

Effects of dietary AOP on the reproductive organ and ovarian follicle development in laying breeder hens.

Items	Treatments			SEM	p-value
	CON	AOP1	AOP3		AOP	Linear	Quadratic
Liver index (%)	1.81	1.88	1.82	0.053	0.852	0.943	0.581
Oviduct weight (g)	37.47b	44.90a	45.45a	1.222	0.004	0.003	0.092
Oviduct index (%)	1.89c	2.67a	2.28b	0.097	0.001	0.023	0.001
Oviduct length (cm)	51.00	54.67	54.83	1.406	0.480	0.289	0.571
Ovarian weight (g)	41.13	41.30	43.55	1.607	0.809	0.566	0.774
Ovary index (%)	2.07	2.20	2.18	0.082	0.815	0.605	0.718
Number of SYF	12.83b	17.33a	17.83a	0.878	0.026	0.014	0.218
Number of POF	5.00b	6.83ab	7.50a	0.422	0.031	0.012	0.453

^a-cMeans within a row with no common superscript differ significantly (p < 0.05). Values are means ± SEM (n = 6 hens). Abbreviations: CON, control group, basal diet; AOP1, basal diet supplemented with 1 g/kg AOP; AOP3, basal diet supplemented with 3 g/kg AOP; POF, preovulatory follicles; SYF, small yellow follicles.