Figure 1. A and B: Comparison of cell-free DNA content in seminal plasma between control and different infertile groups. AZO: non-obstructive azoospermia, OAT:Oligoasthenoteratozoospermia, OA: Oligoasthenospermia and OT: Oligoteratozoospermia. AZO- : negative sperm retrieval, and AZO+ : positive sperm retrieval. Data are presented as mean ± SEM. *p<0.05 and **p<0.01 were considered as significant values.