Udalova L D
Biull Eksp Biol Med. 1977 Feb;83(2):223-4.
A study of the sex ratio in mice of the inbred strains (CBA and C3H) and connection of the postimplantation embryonic mortality in mice of these strains with the sex distribution of embryos demonstrated that the sex ratio in these mice was 1:1. Literature and the author's personal data suggested that genetic features of mice of the inbred strains failed to influence significantly the sex ratio of the offspring. The postimplantation embryonic death rate in the C3H mice exceeded that in the CBA mice (14.4 and 9.3%, respectively). However, the balanced sex ratio in mice of these strains points to the absence of selective mortality of the embryos of any one sex during embryogenesis.
对近交系小鼠（CBA和C3H）的性别比例以及这些品系小鼠植入后胚胎死亡率与胚胎性别分布的关系进行的一项研究表明，这些小鼠的性别比例为1:1。文献和作者的个人数据表明，近交系小鼠的遗传特征对后代的性别比例没有显著影响。C3H小鼠植入后的胚胎死亡率超过CBA小鼠（分别为14.4%和9.3%）。然而，这些品系小鼠的性别比例平衡表明，在胚胎发育过程中不存在任何一种性别的胚胎选择性死亡。
