Evaluation of germ cell progression on testicular tissue from prepubertal cats after vitrification and culture using specific markers.

(A) Percentage of cells labelled with Oct4 (spermatogonia, pre-meiotic stage), (B) Percentage of cells labelled with Boule (spermatocytes, meiotic stage). Data are expressed as mean ± SE (n = 5 animals per treatment). Different letters above bars indicate significant statistical differences between treatments (P < 0.05).