Conclusions
Low oxygen environment may improve the potential of embryonic development, but its impact on pregnancy outcome and birth defect is not significant. 目的: 比较低氧浓度与高氧浓度培养对体外受精-胚胎移植中胚胎发育、妊娠结局以及子代出生缺陷的影响。 方法: 根据胚胎体外培养的氧浓度，将2013至2015年在浙江大学医学院附属妇产科医院行体外受精-胚胎移植的患者随机分为低氧浓度组（ n=2036，培养体系含氧气体积分数为5%）和高氧浓度组（ n=4617，培养体系含氧气体积分数为20%）。比较两组间受精率、优质胚胎率、临床妊娠率、异位妊娠率、流产率以及子代出生缺陷率等结果指标。 结果: 低氧浓度组优质胚胎率高于高氧浓度组（ P < 0.05），但两组间受精率、临床妊娠率、异位妊娠率、流产率和子代出生缺陷的发生率差异均无统计学意义（均 P＞0.05）。 结论: 体外受精-胚胎移植采用低氧环境培养可能有助于提高胚胎发育潜能，但对妊娠结局和子代出生缺陷的影响不明显。
Methods
According to the oxygen concentration of in vitro culture environment, the IVF-ET performed in the Women's Hospital, Zhejiang University School of Medicine during 2013 and 2015 were divided into low oxygen concentration group (n=2036, 5% O2) and high oxygen concentration group (n=4617, 20% O2). The rate of fertilization, good quality embryo, clinical pregnancy, ectopic pregnancy, abortion and birth defect were compared between two groups.
Objective
To investigate the effect of low and high oxygen concentration on embryo development, pregnancy outcome and birth defects of in vitro fertilization-embryo transfer (IVF-ET).
Results
The good quality embryo rate was significantly higher in the low oxygen concentration group (P<0.05). However, no significant differences were found between two groups in the rate of fertilization, clinical pregnancy, ectopic pregnancy, abortion and birth defect (all P>0.05). Conclusions: Low oxygen environment may improve the potential of embryonic development, but its impact on pregnancy outcome and birth defect is not significant. 目的: 比较低氧浓度与高氧浓度培养对体外受精-胚胎移植中胚胎发育、妊娠结局以及子代出生缺陷的影响。 方法: 根据胚胎体外培养的氧浓度，将2013至2015年在浙江大学医学院附属妇产科医院行体外受精-胚胎移植的患者随机分为低氧浓度组（ n=2036，培养体系含氧气体积分数为5%）和高氧浓度组（ n=4617，培养体系含氧气体积分数为20%）。比较两组间受精率、优质胚胎率、临床妊娠率、异位妊娠率、流产率以及子代出生缺陷率等结果指标。 结果: 低氧浓度组优质胚胎率高于高氧浓度组（ P < 0.05），但两组间受精率、临床妊娠率、异位妊娠率、流产率和子代出生缺陷的发生率差异均无统计学意义（均 P＞0.05）。 结论: 体外受精-胚胎移植采用低氧环境培养可能有助于提高胚胎发育潜能，但对妊娠结局和子代出生缺陷的影响不明显。