[Sex ratios in mouse embryos during the postimplantation period of development]

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.