Effects of OGD (2 h) followed by reoxygenation (6–24 h) on the transcription of mitochondrial fusion and fission genes in XY and XX CGNs. Quantification of fusion genes Mfn1 (A) , Mfn2 (B) and fission genes Fis1 (C) and Drp1 (D) were performed by RT-qPCR. Data were normalized to Hprt and related to the transcription levels in untreated control CGNs set as one. Results are mean ± SD (n = 4, *p < 0.05, **p < 0.01, XY vs. XX; +p < 0.05, ++p < 0.01vs. control, a one-way ANOVA followed by Bonferroni/Dunn post hoc test was applied).