Bielli A, Katz H, Pedrana G, Gastel M T., Moraña A, Castrillejo A, Lundeheim N, Forsberg M, Rodriguez-Martinez H
Department of Anatomy and Histology, Faculty of Veterinary Medicine, Centre for Reproductive Biology (CRB), Swedish University of Agricultural Sciences (SLU), Box 7011, SE-75 007, Uppsala, Sweden
Small Rumin Res. 2001 Apr;40(1):63-71. doi: 10.1016/s0921-4488(00)00213-3.
The aim of the experiment was to determine whether supplementation of the lamb-ewe unit during intra-uterine and postnatal life affects testicular stereology, particularly Sertoli cell numbers, in 120 pregnant Corriedale ewes grazed either native pastures (control group) or improved pastures+grain supplement (treated group). Ewes bearing single ram lambs were maintained under the same feeding regime until lambs were castrated (99 days of age). Body weight, testosterone and FSH blood serum levels were recorded at 45, 75 and 99 days of age. Body weight was higher (P<0.01) in the treated group from birth on. Serum testosterone values did not differ between groups. Serum FSH values tended to differ at 45 days of age (P<0.06). Testicular weight and testes histology showed earlier pubertal development and a tendency for higher Sertoli cell numbers in the treated (supplemented) group. This tendency may indicate that extensively reared lambs supplemented during fetal and postnatal life have higher testicular growth and sperm production in later life.
该实验的目的是确定在120只怀孕的考力代母羊的子宫内和出生后生活期间补充营养，是否会影响睾丸的立体结构，特别是支持细胞数量。这些母羊要么在天然牧场放牧（对照组），要么在改良牧场+谷物补充料的环境下饲养（处理组）。怀有单只公羊羔羊的母羊在相同的饲养方式下饲养，直到羔羊被阉割（99日龄）。在45、75和99日龄时记录体重、睾酮和促卵泡激素血清水平。从出生起，处理组的体重就更高（P<0.01）。两组之间的血清睾酮值没有差异。在45日龄时，血清促卵泡激素值有差异倾向（P<0.06）。睾丸重量和睾丸组织学显示，处理（补充营养）组的青春期发育更早，支持细胞数量有增加的趋势。这种趋势可能表明，在胎儿期和出生后生活期间得到补充营养的粗放饲养羔羊，在以后的生活中睾丸生长和精子生成能力更强。
