Fig. 3From: Obesity impairs male fertility through long-term effects on spermatogenesisApoptosis of spermatogenic cells in testicular tissues and comparison of the apoptosis index between the two groups (× 20, arrows indicate apoptotic cells). a control group; b obesity group; c the data are presented as the mean ± s.e.m.; * P < 0.05 and **P < 0.01Back to article page