CELL GROWTH;
PREIMPLANTATION;
SEXUAL DIFFERENTIATION;
Y CHROMOSOME;
D O I:
10.1093/oxfordjournals.humrep.a138783
中图分类号:
R71 [妇产科学];
学科分类号:
100211 ;
摘要:
Growth rates of human preimplantation embryos fertilized in vitro were assessed and compared to the sex of the pregnancy outcome. The likelihood of a liveborn male was significantly greater than that of a female if the mean number of cells/embryo was four or greater at the scheduled time of transfer (odds ratio of 6:1). This finding suggested that the Y chromosome expresses factors which influence embryonic growth rates immediately after fertilization.