Embryos with a poor morphological score at cleavage stage are usually discarded because they are considered unsuitable for transfer and cryopreservation. This study examined the in vitro blastocyst development after e...Embryos with a poor morphological score at cleavage stage are usually discarded because they are considered unsuitable for transfer and cryopreservation. This study examined the in vitro blastocyst development after extended culture of these embryos and the clinical outcomes after transfer of these blastocysts in warming cycles. A total of 597 blastocysts （24.7%） were obtained from 2421 embryos with low morphological scores after extended culture. One hundred and sixty blastocysts （6.6%） with optimal morphology were vitrified. Embryo utilization rate was increased from 30.8% to 32.6%. After warming, 61 out of 92 blastocysts （66.3%） survived and were transferred in 44 cycles. The clinical pregnancy rate and the implantation rate were 40.9% （18/44） and 32.8% （20/61） respectively. Thirteen healthy babies were born, and 5 pregnancies aborted spontaneously. Our study suggested that some blastocysts derived from embryos with a poor morphological score can be successfully vitrified and give rise to live births. Selection and vitrification of viable embryos after extended culture of embryos with a poor morphological score may constitute a proposal to avoid embryo wastage.展开更多
目的分析影响单囊胚冻融移植周期活产结局的相关因素,探讨单囊胚移植的可行性。方法回顾性分析2012年1月至2016年12月在本中心接受单囊胚冻融移植的共2593个周期的临床资料,根据妊娠结局分为活产组(1058个周期)和非活产组(1535个周期),...目的分析影响单囊胚冻融移植周期活产结局的相关因素,探讨单囊胚移植的可行性。方法回顾性分析2012年1月至2016年12月在本中心接受单囊胚冻融移植的共2593个周期的临床资料,根据妊娠结局分为活产组(1058个周期)和非活产组(1535个周期),同时进行年龄(<35岁、35~39岁、≥40岁)和囊胚质量/发育速度分层分析,研究影响单囊胚冻融移植活产结局的相关因素。结果(1)活产组移植年龄中位数显著小于非活产组(31岁vs.32岁),移植日内膜厚度(9.2 mm vs.9.0 mm)和优质囊胚率(72.5%vs.62.5%)则显著高于非活产组(P<0.05)。(2)不同女性年龄组内随着内细胞团和滋养层细胞评分等级降低活产率降低,差异有统计学意义(P<0.05),但并未发现不同囊胚腔扩张等级对活产率的影响(P>0.05);对于年龄<35岁和35~39岁患者,D5囊胚移植较D6/D7囊胚移植具有更高的活产率,差异有统计学意义(P<0.05)。(3)年龄<35岁的女性单囊胚移植活产率高于35岁以上具有相同囊胚评级的患者,并且年龄<35岁BB及以上评级的单囊胚移植可获得>45%的活产率。结论女方年龄、囊胚质量及囊胚发育速度对单囊胚冻融移植周期活产结局有显著影响。复苏周期中35岁以下女性移植单个优质囊胚的活产率可达45%以上,提示单囊胚移植可行。制定个体化胚胎选择策略是确保单胚胎移植成功率的关键。展开更多
文摘Embryos with a poor morphological score at cleavage stage are usually discarded because they are considered unsuitable for transfer and cryopreservation. This study examined the in vitro blastocyst development after extended culture of these embryos and the clinical outcomes after transfer of these blastocysts in warming cycles. A total of 597 blastocysts （24.7%） were obtained from 2421 embryos with low morphological scores after extended culture. One hundred and sixty blastocysts （6.6%） with optimal morphology were vitrified. Embryo utilization rate was increased from 30.8% to 32.6%. After warming, 61 out of 92 blastocysts （66.3%） survived and were transferred in 44 cycles. The clinical pregnancy rate and the implantation rate were 40.9% （18/44） and 32.8% （20/61） respectively. Thirteen healthy babies were born, and 5 pregnancies aborted spontaneously. Our study suggested that some blastocysts derived from embryos with a poor morphological score can be successfully vitrified and give rise to live births. Selection and vitrification of viable embryos after extended culture of embryos with a poor morphological score may constitute a proposal to avoid embryo wastage.
文摘目的分析影响单囊胚冻融移植周期活产结局的相关因素,探讨单囊胚移植的可行性。方法回顾性分析2012年1月至2016年12月在本中心接受单囊胚冻融移植的共2593个周期的临床资料,根据妊娠结局分为活产组(1058个周期)和非活产组(1535个周期),同时进行年龄(<35岁、35~39岁、≥40岁)和囊胚质量/发育速度分层分析,研究影响单囊胚冻融移植活产结局的相关因素。结果(1)活产组移植年龄中位数显著小于非活产组(31岁vs.32岁),移植日内膜厚度(9.2 mm vs.9.0 mm)和优质囊胚率(72.5%vs.62.5%)则显著高于非活产组(P<0.05)。(2)不同女性年龄组内随着内细胞团和滋养层细胞评分等级降低活产率降低,差异有统计学意义(P<0.05),但并未发现不同囊胚腔扩张等级对活产率的影响(P>0.05);对于年龄<35岁和35~39岁患者,D5囊胚移植较D6/D7囊胚移植具有更高的活产率,差异有统计学意义(P<0.05)。(3)年龄<35岁的女性单囊胚移植活产率高于35岁以上具有相同囊胚评级的患者,并且年龄<35岁BB及以上评级的单囊胚移植可获得>45%的活产率。结论女方年龄、囊胚质量及囊胚发育速度对单囊胚冻融移植周期活产结局有显著影响。复苏周期中35岁以下女性移植单个优质囊胚的活产率可达45%以上,提示单囊胚移植可行。制定个体化胚胎选择策略是确保单胚胎移植成功率的关键。
