Table 1.

Design of experiment 1 showing the number of eggs (n) and number of first-grade chicks (n) per noninjected (C1) or injected with 0.9% saline solution (C2 and C3) or oregano essential oil (OEO, T1–T6) in the air cell, amniotic fluid, or yolk during mid-incubation (embryonic day 12 [E12]) or late incubation (embryonic day 17.5 [E17.5]).

Treatment	Site of injection	Day of injection	Injected solution	Number of eggs (n)	Number of chicks (n)
C1	-	-	-	40	34
C2	Air cell	E12	Saline	40	33
C3	Amniotic fluid	E17.5	Saline	40	32
T1	Air cell	E12	OEO	100	74
T2	Amniotic fluid	E12	OEO	100	74
T3	Yolk	E12	OEO	100	64
T4	Air cell	E17.5	OEO	100	74
T5	Amniotic fluid	E17.5	OEO	100	69
T6	Yolk	E17.5	OEO	100	73