Table 5.

Reproductive organs development of hens during a study to evaluate SY efficacy.¹

Item	Blank control	SS control	Supplemental Se level (mg/kg of diet, SY)				SEM	Significance
			0.1	0.2	0.3	0.4
Preovulatory follicle amount (n)	5.500	5.500	5.167	5.667	5.200	5.333	0.161	0.533
Small yellow follicle amount (n)	20.833	17.167	19.667	20.333	21.400	22.000	1.061	0.970
Big white follicle amount (n)	27.500	37.167	37.167	35.333	35.400	26.500	1.695	0.125
Oviduct length (cm)	72.750	74.583	76.117	72.267	70.100	70.583	1.227	0.449
Oviduct length index (cm/kg)	42.250	45.457	44.653	41.339	41.017	44.644	0.686	0.270
Preovulatory follicle index (%)	1.829	2.045	1.772	1.823	1.895	1.872	0.068	0.549
Small yellow follicle index (%)	0.137	0.127	0.119	0.122	0.126	0.144	0.007	0.741
Big white follicle index (%)	0.027	0.031	0.028	0.030	0.028	0.019	0.002	0.300
Ovary index (%)	2.155	2.430	2.167	2.210	2.272	2.278	0.067	0.318
Oviduct index (%)	3.665	4.106	4.086	3.567	3.805	4.239	0.088	0.049
Uterus index (%)	0.186	0.192	0.201	0.182	0.166	0.180	0.005	0.309

Abbreviations: Se, selenium; SS, sodium selenite; SY, Se-enriched yeast.

¹Values are means of 6 replicates per dietary treatment.