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| <正>反复种植失败(repeated/recurrent implantation failure,RIF)即指不孕症患者经历多个体外受精(in vitro fertilization,IVF)/卵细胞浆内单精子注射(intracytoplasmic sperm injection,ICSI)周期并移植了多枚优质胚胎而未发生胚胎种植或临床妊娠。随着控制性卵巢刺激(controlled ovarian stimulation,COS)方案的 |
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