Table 2.

Effect of age at photostimulation on ovary and oviduct characteristics of White Leghorn breeders at 28 wk of age.

Item	Age at photostimulation (wk)				SEM	P-value
	16	18	20	22
Ovary weight, %	3.03	2.92	2.98	2.86	0.05	0.96
Large yellow follicles, n	5.25	6.00	5.25	5.50	0.21	0.66
Oviduct weight, %	4.10	3.45	3.64	4.43	0.22	0.58
Oviduct length, cm	49.46	49.81	44.22	53.82	1.53	0.07

Data are the mean of 2 replicates with 2 birds each.