取卵后第17天血清β-hCG预测体外受精-胚胎移植早期妊娠结局的价值
취란후제17천혈청β-hCG예측체외수정-배태이식조기임신결국적개치
Predictive value of serum β-Hcg levels at 17 days after ovulation on early pregnaney outcome in vitro fertilization-embryo tranfer
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