Fig. 5From: Human umbilical cord stem cell conditioned medium versus serum-free culture medium in the treatment of cryopreserved human ovarian tissues in in-vitro culture: a randomized controlled trialHUMSC-CM inhibited follicular apoptosis as detected by active caspase-3 (AC-3) immunohistochemistry over 8 days. a Representative images of the AC-3 immunohistochemistry staining of the follicles. a and b: Apoptosis was observed in the morphologically normal PF (*); c and d: Follicular apoptosis was not observed (×100 (c), ×200 (a, d), ×400 (d), scale bar = 400 μm). b Percentage of AC-3 positively stained follicles over 8 consecutive days is shown in the two groups. *p < 0.05, versus group BBack to article page