Bedair G A, Thibier M
J Reprod Fertil. 1979 May;56(1):7-10. doi: 10.1530/jrf.0.0560007.
Peripheral plasma samples were collected from 37 young bulls every other month from 2 to 12 months of age. Androstenedione and testosterone were measured by radioimmunoassays. Androstenedione values increased from 2 to 4 months of age (525 +/- 296 (s.d.) pg/ml) and then decreased. Testosterone concentrations increased regularly from 2 months (0.17 +/- 0.14 ng/ml) to 6 months (2.79 +/- 1.29 ng/ml) and then remained at levels around 3 ng/ml. Coefficients of correlation between the hormone concentrations were significant only at 6 months and thereafter.
在37头小公牛2至12月龄期间，每隔一个月采集外周血样。采用放射免疫分析法测定雄烯二酮和睾酮水平。雄烯二酮值在2至4月龄时升高（525±296（标准差）pg/ml），随后下降。睾酮浓度从2月龄（0.17±0.14 ng/ml）有规律地升高至6月龄（2.79±1.29 ng/ml），随后维持在3 ng/ml左右。激素浓度之间的相关系数仅在6月龄及之后有统计学意义。
