Aguilar E, Pinilla L, Guisado R, González D, López F
Rev Esp Fisiol. 1984 Mar;40(1):83-6.
Body weight, growth rate, chronological age and puberty in female and male rats from litters of 8 and 12 offsprings/mother have been studied. Age and body weight at the moment of vaginal opening (VO) and balanopreputial separation (BPS) were analyzed. Results show that animals reared in smaller groups grew faster than others. After weaning there was an increase in growth rate. VO and BPS occurred at the same age in groups with different growth rates and different body weights. In conclusion this work evidences that external signs of sexual maturation are not linked to a "critical weight" or to a "growth rate".
对每窝产仔8只和12只的雌性和雄性大鼠的体重、生长速率、实足年龄和青春期进行了研究。分析了阴道开口（VO）和包皮分离（BPS）时的年龄和体重。结果表明，饲养在较小群体中的动物比其他动物生长得更快。断奶后生长速率增加。在具有不同生长速率和不同体重的群体中，VO和BPS发生在相同年龄。总之，这项研究证明性成熟的外部标志与“临界体重”或“生长速率”无关。
