Fig. 3From: Effect of animal-sourced bioactive peptides on the in vitro development of mouse preantral folliclesThe hormone levels of follicles cultured in vitro for 14 d. A: E2 levels of follicles cultured in vitro after different periods; B: P4 levels of follicles cultured in vitro after different periods. Note: In each panel, labeling with the different letter in each column indicates significant differences between different groups (P < 0.05)Back to article page