Fig. 2.

Normalized net mean numbers of apoptotic signals obtained for different groups of embryos. The normalized net mean numbers of apoptotic signals (N ± SE) obtained for embryos in the C, I_XU_Y, I_X and U_Y groups for the three to four replicates of the three experimental schemes (Condition 1 [I_LU_L], Condition 2 [I_HU_H] and Condition 3 [I_HU_L]). The results (for [I_LU_H]) from our previous study [34] were also included for comparison. *Cases with P ≤ 0.05 were considered statistically significant using Student's t-test by comparing with the corresponding C group of embryos under each experimental condition. ^aData extracted from Ref. [34].