Parameters

Control (n = 12)

Essential oil doses (μl / kg body weight)

p value

50 (n = 12)

100 (n = 12)

150 (n = 12)

Egg characteristics

Egg weight (g)

12.34 ± 0.15^c

12.73 ± 0.51^b

13.31 ± 0.22^a

12.76 ± 0.21^b

0.00

Shape index

0.74 ± 0.02^a

0.77 ± 0.04^a

0.76 ± 0.03^a

0.78 ± 0.03^a

0.31

Hatchability traits (%)

Fertility

75.00 ± 7.95^b

82.14 ± 2.47^ab

89.29 ± 5.89^a

85.71 ± 1.58^a

0.01

Hatchability of fertile eggs

65.83 ± 11.43^b

63.09 ± 10.85^b

91.67 ± 8.82^a

83.09 ± 2.345^a

0.00

Total hatchability

67.86 ± 9.37^b

64.29 ± 6.80^b

85.71 ± 12.37^a

76.07 ± 7.13^a

0.03

Embryonic mortality

22.92 ± 4.17^a

13.57 ± 2.40^b

4.17 ± 3.14^c

7.74 ± 8.99^bc

0.00

Chick’s weight (g)

8.59 ± 0.79^b

8.94 ± 0.97^ab

9.65 ± 1.36^a

9.56 ± 1.27^a

0.03