Embryo sex was identified by single blastomere FISH after embryo biopsy.Female embryos were transferred into uterus.Results A total of 110 cumulus-oocyte complex were retrieved in 5 treatment cycles.

• 大多数性连锁隐性遗传性疾病只能在产前检查时选择女性胎儿来避免有基因表现型的男性患儿的出生。