Root M V, Johnston S D, Olson P N
Department of Small Animal Clinical Sciences, University of Minnesota, College of Veterinary Medicine, St. Paul 55108, USA.
Vet Radiol Ultrasound. 1997 Jan-Feb;38(1):42-7. doi: 10.1111/j.1740-8261.1997.tb01601.x.
Male (n = 6/group) and female (n = 6/group) kittens were gonadectomized at 7 weeks (prepuberally) or 7 months of age (postpuberally), or left intact. Lateral radiographic projections of the right forelimb were made from 4 months of age until the distal radial physis was closed, or 24 months of age. In males, distal radial physeal closure was delayed in both groups of gonadectomized animals, compared to intact males (p < 0.01). In females, proximal radial physeal closure was significantly delayed in prepuberally gonadectomized animals (p = 0.02), and distal radial physeal closure was significantly delayed in both groups of gonadectomized animals, compared to intact animals (p < 0.01). Final radial length (females p < 0.01, males p = 0.01), and age and radial length at time of the growth plateau (p < 0.01) were significantly increased in all gonadectomized animals. Age at gonadectomy had no effect on age and radial length at time of the growth plateau. No puberal growth spurt was observed in any of the cats.
雄性（每组6只）和雌性（每组6只）小猫在7周龄（青春期前）或7月龄（青春期后）时进行去势手术，或保持完整。从4月龄开始直至桡骨远端骨骺闭合或到24月龄，对右前肢进行侧位X线投影。在雄性中，与未去势的雄性相比，两组去势动物的桡骨远端骨骺闭合均延迟（p < 0.01）。在雌性中，青春期前去势的动物桡骨近端骨骺闭合显著延迟（p = 0.02），与未去势的动物相比，两组去势动物的桡骨远端骨骺闭合均显著延迟（p < 0.01）。所有去势动物的最终桡骨长度（雌性p < 0.01，雄性p = 0.01）以及生长平台期时的年龄和桡骨长度（p < 0.01）均显著增加。去势时的年龄对生长平台期时的年龄和桡骨长度没有影响。在任何一只猫中均未观察到青春期生长突增。
