Fig. 4

ZYP improved ovarian reserve in DOR. a H&E staining of ovarian tissues in the indicated groups (× 20, × 100, × 200 magnification). b Number of ovarian follicles in different stages and the number of corpora lutea in rats. #P < 0.05, compared with the control group; *P < 0.05, **P < 0.01 and ***P < 0.001, compared with the model group (n = 12). c Number of ovarian follicles in different stages and the number of corpora lutea in mice. #P < 0.05, compared with the control group; *P < 0.05, compared with the model group (n = 12). Data are presented as mean ± standard deviation of the mean