Testicular size in young adult Sinhalese.

Height, body weight, arm span and testicular size were measured in 200 Sinhalese men aged 21-31 years. The mean +/- SD right testicular size was 17.2 + 4.1 ml and that of the left was 16.1 + 3.9 ml. The testes were of equal size in 75% and the right testis was larger in 20% of the men. The prevalence of undescended testes was 2%. There as a significant correlation of testicular size with weight (p < 0.05) and a significant correlation of right testicular size with span (p < 0.01). Testicular size was not correlated with height or body mass index. Although the Sinhalese are ethnically closer to the Caucasians, their testicular size is similar to that reported by previously for Thai men.