Objective: To determine the prognostic value of sperm DNA fragmentation levels, as measured by the sperm chromatin dispersion (SCD) test, in predicting IVF and ICSI outcome. Design: Double- blind prospective study. Se...Objective: To determine the prognostic value of sperm DNA fragmentation levels, as measured by the sperm chromatin dispersion (SCD) test, in predicting IVF and ICSI outcome. Design: Double- blind prospective study. Setting: University- affiliated private IVF setting. Patient(s): A total of 85 couples undergoing infertility treatment with IVF/ICSI. Intervention( s): Analysis of DNA fragmentation by the SCD test in 170 aliquots obtained from the ejaculate and from the processed semen used for assisted reproductive technologies (ART). Main Outcome Measure(s): Percentage of spermatozoa with fragmented DNA was statistically correlated with embryo quality and reproductive success. Result(s): Fertilization rate was inversely correlated with DNA fragmentation (r =- 0.245 P=.045). Higher DNA fragmentation rate gave an increased proportion of zygotes showing asynchrony between the nucleolar precursor bodies of zygote pronuclei (73.8% vs. 28.8% P < .001). In addition, the slower embryo development and worst morphology on day 6 was correlated with higher sperm DNA fragmentation (47.7% vs. 29.4% P=.044). We also observed a negative correlation between DNA fragmentation and the implantation rate (r =- 0.250 P=.042). However, SCD test values were not statistically different in cycles that resulted in a pregnancy compared with those that did not (33.2 vs. 28.2 and 32.4 vs. 34.7). Conclusion(s): This is the first report that describes a correlation between sperm DNA integrity, asmeasured by the SCD test, and fertilization rate, embryo quality, and implantation rate in IVF/ICSI. The degree of DNA fragmentation was inversely correlatedwith fertilization rate, synchrony of the nucleolar precursor bodies’ pattern in pronuclei, embryo ability to achieve blastocyst stage, and embryo morphological quality. Because SCD test values were correlated with embryo quality and blastocyst rate, the lack of correlation between sperm DNA fragmentation and pregnancy outcome in IVF might be due to embryo selection before transfer. The ability of t展开更多
目的评估密度梯度离心联合上游法改善精子DNA碎片(sperm DNA fragmentation)的效率及其对体外受精-胚胎移植(IVF-ET)妊娠结局的影响。方法收集120份处理前后的精液,用精子染色质扩散法检测精子DNA碎片,评估其对100个新鲜移植患者妊娠结...目的评估密度梯度离心联合上游法改善精子DNA碎片(sperm DNA fragmentation)的效率及其对体外受精-胚胎移植(IVF-ET)妊娠结局的影响。方法收集120份处理前后的精液,用精子染色质扩散法检测精子DNA碎片,评估其对100个新鲜移植患者妊娠结局的影响。结果优选后,男性不育组精子DNA碎片率(SDFI)由22.75(14.44,30.25)降至11.5(5.60,22.79),对照组则由20.86(15.00,26.81)降至7.5(3.63,15.44);妊娠组精子DNA碎片明显低于非妊娠组,ROC曲线下面积是0.667;高水平组(DFI≥20%)的妊娠率和出生率低于低水平组(DFI<20%),差异有统计学意义。结论密度梯度离心联合上游法可减少精子DNA碎片;优选后DNA碎片对IVF-ET妊娠结局具有预测价值,一旦超过阈值,虽可正常受精,但妊娠率和出生率下降。展开更多
目的:探讨精子DNA碎片化率(DFI)对体外受精结局的影响。方法:采用改良精子染色质扩散实验(SCD)对139例接受体外受精(IVF)的男方进行精子DFI检测,并根据精子DFI值将上述IVF患者分为:A组(DFI<17.6%)、B组(17.6%≤DFI≤30%)、C组(DFI>...目的:探讨精子DNA碎片化率(DFI)对体外受精结局的影响。方法:采用改良精子染色质扩散实验(SCD)对139例接受体外受精(IVF)的男方进行精子DFI检测,并根据精子DFI值将上述IVF患者分为:A组(DFI<17.6%)、B组(17.6%≤DFI≤30%)、C组(DFI>30%),根据单因素方差分析统计方法分析各组IVF受精率、卵裂率、优质胚胎率和妊娠结局的差异。结果:与A组比较,B组和C组正常形态精子率、精子前向活动力([a+b)%]、卵裂率、优质胚胎率均降低(P>0.05 vs B组,P<0.05 vs C组);与B组比较,C组正常形态精子率、精子前向活动力([a+b)%]、卵裂率、优质胚胎率均降低(P<0.05);与A组比较,B组和C组受精率均降低(P<0.05 vs B组,P<0.05 vs C组);与B组比较,C组受精率降低(P<0.05);A、B、C 3组间生化妊娠率、临床妊娠率差异无统计学意义(P>0.05)。结论:精子DNA碎片率升高不仅会导致精子前向活动力下降,还可导致IVF受精率、卵裂率、优质胚胎率下降,但对临床妊娠结局无明显影响。展开更多
文摘Objective: To determine the prognostic value of sperm DNA fragmentation levels, as measured by the sperm chromatin dispersion (SCD) test, in predicting IVF and ICSI outcome. Design: Double- blind prospective study. Setting: University- affiliated private IVF setting. Patient(s): A total of 85 couples undergoing infertility treatment with IVF/ICSI. Intervention( s): Analysis of DNA fragmentation by the SCD test in 170 aliquots obtained from the ejaculate and from the processed semen used for assisted reproductive technologies (ART). Main Outcome Measure(s): Percentage of spermatozoa with fragmented DNA was statistically correlated with embryo quality and reproductive success. Result(s): Fertilization rate was inversely correlated with DNA fragmentation (r =- 0.245 P=.045). Higher DNA fragmentation rate gave an increased proportion of zygotes showing asynchrony between the nucleolar precursor bodies of zygote pronuclei (73.8% vs. 28.8% P < .001). In addition, the slower embryo development and worst morphology on day 6 was correlated with higher sperm DNA fragmentation (47.7% vs. 29.4% P=.044). We also observed a negative correlation between DNA fragmentation and the implantation rate (r =- 0.250 P=.042). However, SCD test values were not statistically different in cycles that resulted in a pregnancy compared with those that did not (33.2 vs. 28.2 and 32.4 vs. 34.7). Conclusion(s): This is the first report that describes a correlation between sperm DNA integrity, asmeasured by the SCD test, and fertilization rate, embryo quality, and implantation rate in IVF/ICSI. The degree of DNA fragmentation was inversely correlatedwith fertilization rate, synchrony of the nucleolar precursor bodies’ pattern in pronuclei, embryo ability to achieve blastocyst stage, and embryo morphological quality. Because SCD test values were correlated with embryo quality and blastocyst rate, the lack of correlation between sperm DNA fragmentation and pregnancy outcome in IVF might be due to embryo selection before transfer. The ability of t
文摘目的评估密度梯度离心联合上游法改善精子DNA碎片(sperm DNA fragmentation)的效率及其对体外受精-胚胎移植(IVF-ET)妊娠结局的影响。方法收集120份处理前后的精液,用精子染色质扩散法检测精子DNA碎片,评估其对100个新鲜移植患者妊娠结局的影响。结果优选后,男性不育组精子DNA碎片率(SDFI)由22.75(14.44,30.25)降至11.5(5.60,22.79),对照组则由20.86(15.00,26.81)降至7.5(3.63,15.44);妊娠组精子DNA碎片明显低于非妊娠组,ROC曲线下面积是0.667;高水平组(DFI≥20%)的妊娠率和出生率低于低水平组(DFI<20%),差异有统计学意义。结论密度梯度离心联合上游法可减少精子DNA碎片;优选后DNA碎片对IVF-ET妊娠结局具有预测价值,一旦超过阈值,虽可正常受精,但妊娠率和出生率下降。
文摘目的:探讨精子DNA碎片化率(DFI)对体外受精结局的影响。方法:采用改良精子染色质扩散实验(SCD)对139例接受体外受精(IVF)的男方进行精子DFI检测,并根据精子DFI值将上述IVF患者分为:A组(DFI<17.6%)、B组(17.6%≤DFI≤30%)、C组(DFI>30%),根据单因素方差分析统计方法分析各组IVF受精率、卵裂率、优质胚胎率和妊娠结局的差异。结果:与A组比较,B组和C组正常形态精子率、精子前向活动力([a+b)%]、卵裂率、优质胚胎率均降低(P>0.05 vs B组,P<0.05 vs C组);与B组比较,C组正常形态精子率、精子前向活动力([a+b)%]、卵裂率、优质胚胎率均降低(P<0.05);与A组比较,B组和C组受精率均降低(P<0.05 vs B组,P<0.05 vs C组);与B组比较,C组受精率降低(P<0.05);A、B、C 3组间生化妊娠率、临床妊娠率差异无统计学意义(P>0.05)。结论:精子DNA碎片率升高不仅会导致精子前向活动力下降,还可导致IVF受精率、卵裂率、优质胚胎率下降,但对临床妊娠结局无明显影响。
