@article{article_263032, title={The Incidence of Cryptorchidism and Testis Hypoplasia Examined Through Pathologic and Androgenic Evaluations with the Resultant Effect on the Fertility in Merino Rams}, journal={Eurasian Journal of Veterinary Sciences}, volume={12}, pages={93–104}, year={1996}, author={Çiftçi, M. Kemal and Çoyan, Kenan and Güven, Bülent and Yener, Zabid and Karaca, Fikret and Türkütanıt, S. Serap}, keywords={Merinos, testis, kriptorşizm, patoloji, androjen}, abstract={Total of 5578 male merinos were evaluated for cryptorchidism and testis hypoplasia in HAYMAREN Konya, KAE- Bandırma. and TIG EM- Altınova, born in 1 993 and 1 994, Polatlı and Karacabey in 1 994. The ineidence of cryptorchidism was 1 0.3 and 8.5% in Haymaren- Konya, 23.2 and 7.1 %in KAE- Bandı rma, 5.7 and 2.9% in Al­tınova, N/A and 5.6 % in Polatlı, N/A and 8.5% in Karacabey in 1 993 and 1994, respectively. The ineidence of testis hypoplasia was 5.3 and 6.3% in Haymaren- Konya, 5.7% and N/A in KAE- Bandırma, 6.7% and N/A in Altınova in 1993 and 1994, respectively. 67.7 % bilateral and 32.3 % unilateral, of which, 83.2 % was right cryptorchid testes were detected. 69.6 % bilateral and 30.4 % unilateral, of which, 64.7 % left hypoplastic testes were detected.Certain nummer of rams with cryptorchid and hypoplastic testes was selected for plasma levels of testosterone, LH , FSH and spermatologic evaluation. When the rams reached 1 year of age, they were terminated, and the testes were subjected to microscopic and macroscopic evaluations. Tubulus seminiferus contortuses were covered with foetal serteli cells, smail in diameter in cryptorchid testes. Spermatogenesis ceased at spermatid and secondary spermatocyte phases in light and moderate hypoplastic testes, respectively. Bilateral moderate degree hypoplasia was characterised by azo­ospermia. While plasma testosterone levels were within normal limits orhighly increased, LH levels were highly inc­reased in cryptorchid testes. FSH levels were found to be highly increased in cryptorchid and hypoplastic testes. ln this study, the ineidence of cryptorchidism was found to be high and attributed to the hereditary factors, which was thought that would be decreased by selection. Pathological changes found was not to be detectable until sexual ma­turity. lt was concluded that the rams must be at least 1 2 months old in order to detect the hypoplastic testes}, number={2}, publisher={Selçuk Üniversitesi}