Table 1.

Comparison of reproductive organ weights (mean ± SD) of adult cynomologus macaques, rhesus macaques and baboons

Anatomical measurements	Cynomologus Macaque (≥ 4 years old) N = 42	Rhesus Macaque (≥ 6 years old) N = 11	Baboons (≥ 6 Years) N = 67	Marmoset (≥ 3 years) N=5
Body weight (kg)	5.815 ± 3.16	10.06 ± 2.04	27.14 ± 4.49	0.29 ± 0.045
Prostate parameters
Cranial prostate weight (g)	1.73 ± 1.56	3.22 ± 0.63	2.95 ± 1.22	ND
Caudal prostate weight (g)	1.38 ± 1.09	3.58 ± 1.19	5.33 ± 1.93	ND
Total prostate weight (g)	2.94 ± 2.37	6.80 ± 1.54	8.28 ± 3.06	0.25 ± 0.09
Total prostate to body weight ratio (g/kg)	0.51	0.68	0.31	0.86
Testis parameters
Left testis weight	12.61 ± 11.42	23.76 ± 5.45	33.87 ± 9.88	0.43 ± 0.054
Right prostate weight	13.23 ± 11.60	24.18 ± 5.66	33.90 ± 10.05	0.40 ± 0.13
Left testis weight to body weight ratio (g/kg)	2.17	2.36	1.25	1.48
Epididymis parameters
Left epididymis weight (g)	1.94 ± 1.38	4.27 ± 0.93	5.93 ± 3.02	0.10 ± 0.03
Right epididymis weight (g)	2.21 ± 1.40	4.36 ± 0.55	6.04 ± 3.27	0.11 ± 0.04
Left epididymis to body weight ratio	0.33	0.42	0.22	0.34
Seminal vesicle parameters
Left seminal vesicle weight (g)	3.27 ± 2.76	14.76 ± 7.99	18.82 ± 10.20	ND
Right seminar vesicle weight (g)	3.48 ± 2.91	16.35 ± 8.69	19.05 ± 10.23	ND
Seminal vesicle to body weight ratio (g/kg)	0.56	1.47	0.69	ND