Effect of Heat Stress on Egg Production, Steroid Hormone Synthesis, and Related Gene Expression in Chicken Preovulatory Follicular Granulosa Cells.

In contrast, the transcription levels of CYP19A1 in the 41 °C and 43 °C groups showed a decreasing trend after heat treatment, and both the transcription levels in the 41 °C ( p < 0.05) and 43 °C group ( p < 0.01) were significantly lower than those in normal culture conditions at 24 and 36 h ( Figure 4 E).

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