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Table 1 The comparison of hen’s ovulation rate and follicular sizes F1 to F5 in control and treated groups (mean ± SD)

From: The stimulation and inhibition of beta-2 adrenergic receptor on the inflammatory responses of ovary and immune system in the aged laying hens

  Control BAA2 BB3 SEM4 p-value
Ovulation rate1 (%) 61.05 ± 8.935 b 72.15 ± 8.89a 67.3 ± 9.97a 2.9 < 0.05
Follicular size
 Follicle F1 (mm) 27.85 ± 5.39a 32.4 ± 0.32a 30.52 ± 2.24a 2.06 0.152
 Follicle F2 (mm) 27.25 ± 3.15a 27.52 ± 3.05a 25.24 ± 6.39a 2.05 0.188
 Follicle F3 (mm) 20.77 ± 4.4a 23.33 ± 4.5a 20.08 ± 3.66a 1.93 0.7
 Follicle F4 (mm) 15.62 ± 4.31a 19.37 ± 2.74a 15.71 ± 4a 1.77 0.44
 Follicle F5 (mm) 11.38 ± 2.02a 13.43 ± 1.18a 9.85 ± 2.11a 1.34 0.62
  1. 1) Egg laying frequency, 2) Beta-2 adrenergic agonist (Salmeterol, 1 mg/kg live BW), 3) Beta blocker (Propranolol, 2 mg/kg live BW), 4) Standard error of the mean, 5) Standard deviation (SD), and Different statistical letters (a-b) are significant (p < 0.05) according to the Duncan’s multiple range test