Sundby A, Joakimsen O
Acta Vet Scand. 1982;23(3):438-45. doi: 10.1186/BF03546795.
No significant differences in plasma testosterone level were observed between cows carrying a male foetus and cows carrying a female foetus at any ten-day interval from day 35 of gestation until parturition. Reported higher abortion rates for male than for female foetuses would thus appear not to be due to effects of foetal testosterone on the maternal endocrine balance. In spite of a great individual variation in plasma testosterone values at similar stages of gestation, certain trends are evident. From the 35th to the 80th day of gestation the average concentration was 90–100 pg/ml. Later it rose and reached 200 pg/ml on the 180th day, remaining at this level until after partus. During the first day after parturition plasma testosterone fell significantly and stabilized around 120 pg/ml.
从妊娠第35天到分娩，在任何十天间隔内，怀有雄性胎儿的母牛和怀有雌性胎儿的母牛之间，血浆睾酮水平均未观察到显著差异。因此，报告中雄性胎儿比雌性胎儿更高的流产率似乎并非由于胎儿睾酮对母体内分泌平衡的影响。尽管在妊娠相似阶段血浆睾酮值存在很大的个体差异，但某些趋势是明显的。从妊娠第35天到第80天，平均浓度为90 - 100 pg/ml。之后它上升，在第180天达到200 pg/ml，并一直保持这个水平直到产后。在产后第一天，血浆睾酮显著下降并稳定在120 pg/ml左右。
