Bratte, L., Arijeniwa, A. and Ikhimioya, I. 1999. Age and body weight and their relationship with testicular and horn development in Yankasa X West African dwarf crossbred rams. J. Appl. Anim. Res., 15: 201–206. The effect of age and, body weight (BW) on scrotal circumference (SC), scrotal length (SL) and average horn length (AHL) was investigated in eight 3/4 Yankasa x 1/4 West African Dwarf rams born as singles from birth to 72 weeks of age. Ram BW, SC, SL and AHL generally increased with age, the increase of BW and SC being faster from birth to 24 weeks of age than at older ages. Ram age accounted for over 80% of the variation in BW and, SC, whereas BW accounted, for over 79% of the variation in SC and SL and for only about 75% of that in AHL. R was concluded that since scrotal dimensions were strongly related, to sexual activity and sperm output, body weight and. scrotal size may be used, for assessment of a, ram's breeding potentials.