Table I.

Comparison of the different spermatogenesis cells counts between study groups (8 rats in each group

Parameters	Morphine	Naloxone	Morphine + Naloxone	Sham	Control	p-value
Spermatogonia	51 ± 3.46	65 ± 3.46	66 ± 3.62	68 ± 2	69 ± 1.40	<0.001
Spermatocyte	60 ± 2.77	125 ± 3.16	124 ± 3.58	128 ± 2.87	135 ± 6.54	<0.001
Spermatid	0±0	51 ± 21.59	57 ± 4.59	64 ± 3.46	64 ± 4.06	<0.001
Sperm	0±0	235 ± 3.77	220 ± 3.81	247 ± 6.10	250 ± 6.54	<0.001
Testes Weight (mg)	1.12 ± 0.04	1.35 ± 0.03	1.32 ± 0.01	1.38 ± 0.02	1.39 ± 0.05	<0.001

Data are presented as mean±SD. Mann-Whitney U test was used.