cleavage block meaning in Chinese

裂块

Background : in - vitro maturation ( ivm ) of human oocytes would be an attractive alternative to gonadotrophin stimulation for in - vitro fertilization ( ivf ) . it could avoid the complications of gonadotrophin stimulation and reduce the cost of drugs . however , the efficiency of existing ivm technique is suboptimal because embryos resulting from ivm oocytes exhibit frequent cleavage blocks and low implantation rate
研究背景：近20年来，辅助生育技术有了突飞猛进的发展，体外受精、卵浆内单精子注射技术( intracytoplasmicsperminjection , icsl )和种植前遗传学诊断技术的成熟标志着人类生殖医学进入了崭新的领域，但同时也不能否认，在这一领域中还存在诸如妊娠率低、药物副作用和多胎率高等问题。