Fig. 3From: Sperm chromatin condensation as an in vivo fertility biomarker in bulls: a flow cytometry approachHeat map of Pearson correlation coefficients (R) between non-return rates of bulls (NRR) and A conventional sperm quality parameters (sperm morphology, viability, total and progressive motility) and B sperm chromatin condensation evaluated by chromomycin A3 (CMA3)/Yo-Pro-1 and flow cytometry, both assessed at 0 h and 4 h post-thaw. n = 25. * P < 0.05Back to article page