Incidence of undescended testis in a population of children at Benin City

One thousand; eight hundred and ninety-six children aged 6 to 12 years were examined for undescended testis. The incidence was found to be 0.8in the 6 year olds; and also in the 7 and 8 years groups. The overall incidence was 0.4. A differential intrascrotal descent rate was also discovered between the right and left testes; by observations of position of testis in scrotum in each age group: thus while at the age of 6 years 9.4of the left testes and 6of the right testes had touched the base of the scrotum; at the age of 12 years 88.3of the left testes but 95.7of the right testes lay in the base of the scrotum