Figure 1. Spermatozoa with different TUNEL staining patterns (1000x)
A: Negative sperm in white light; A.1: negative sperm with 0% fluorescence under UV light.
B: Negative sperm with <50% fluorescence in white light;
B.1: Negative sperm with <50% fluorescence in UV light.
C: Positive sperm with >50% fluorescence in white light;
C.1: Positive sperm with >50% fluorescence in UV light (from Riva et al., 2018)