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. 2020 Jan 24;99(2):1163–1173. doi: 10.1016/j.psj.2019.12.028

Figure 2.

Figure 2

Plasma progesterone and estradiol hormone profiles in low egg producing hens (LEPH) and high egg producing hens (HEPH) sampled outside (basal) and inside (surge) of the preovulatory surge (PS). Significant differences in steroid plasma concentrations are denoted with an asterisk (*P ≤ 0.05, **P ≤ 0.01, and ***P ≤ 0.001). Solid lines indicate a significant difference between LEPH and HEPH for a given condition, whereas dotted lines indicate a significant difference between basal and surge for a given egg production level.