Thompson D L, Pickett B W, Squires E L, Amann R P
J Reprod Fertil Suppl. 1979(27):13-7.
Factors affecting testicular measurements in situ and the relationships among the measurements and various reproductive characteristics were studied using data from 48 stallions. Mean values during the breeding season are provided for scrotal width, widths and lengths of individual testes, combined weight of testicular parenchyma, daily sperm production and daily sperm output. Testicular measurements were highly repeatable from day to day and for repeated measurements on a given day; technician provided the largest source of variation in the measurements of a given stallion. Age significantly affected all testicular measurements; testicular size for 2- to 3-year-old stallions did not differ (P greater than 0.05) from that for 4- to 6-year-olds, but was smaller (P less than 0.05) than testicular size of stallions greater than or equal to 7 years old. Scrotal width was correlated (P less than 0.01) with daily sperm production (r = 0.75) and daily sperm output (r = 0.55) and was generally the most repeatable measurement.
利用48匹种马的数据，研究了影响睾丸原位测量的因素以及这些测量值与各种繁殖特征之间的关系。给出了繁殖季节阴囊宽度、单个睾丸的宽度和长度、睾丸实质的总重量、每日精子生成量和每日精子输出量的平均值。睾丸测量在不同日期以及同一天的重复测量中具有高度可重复性；技术员是给定种马测量值中最大的变异来源。年龄显著影响所有睾丸测量值；2至3岁种马的睾丸大小与4至6岁种马的睾丸大小无差异（P>0.05），但小于7岁及以上种马的睾丸大小（P<0.05）。阴囊宽度与每日精子生成量（r = 0.75）和每日精子输出量（r = 0.55）相关（P<0.01），并且通常是最具可重复性的测量值。
