Udalova L D
Biull Eksp Biol Med. 1976 Feb;81(2):234-5.
Sex ratio in the embryos if the CBA mice was studied on the 10th and 18th days of gestation to analyze the relationship between the mortality and sex of the embryo. Spontaneous mortality of embryos was shown to be independent of sex of the embryos , and sex ratio of the embryos at different stages of embryogenesis was no different from 1 : 1.
在妊娠第10天和第18天研究CBA小鼠胚胎的性别比例，以分析胚胎死亡率与性别的关系。结果显示胚胎的自然死亡率与胚胎性别无关，且胚胎发育不同阶段的性别比例与1:1无差异。
