目的:研究精子DNA片段化(sperm DNA fragmentation,SDF)水平对不同年龄女性行IVF助孕结局的影响。方法:本研究回顾性分析了2019年7月至2023年6月间于中山大学孙逸仙纪念医院生殖中心首次行IVF助孕患者的临床资料,共1773对夫妇。并通过...目的:研究精子DNA片段化(sperm DNA fragmentation,SDF)水平对不同年龄女性行IVF助孕结局的影响。方法:本研究回顾性分析了2019年7月至2023年6月间于中山大学孙逸仙纪念医院生殖中心首次行IVF助孕患者的临床资料,共1773对夫妇。并通过精子染色质分散(Sperm Chromatin Dispersion,SCD)实验对男方射出的精子进行SDF水平检测。根据年龄将女性患者分为三个组:<36岁,36-40岁,>40岁;并在每个女性年龄分组中使用30%SDF作为临界点分为两个亚组。主要结局指标为胚胎着床率、临床妊娠率和流产率。结果:对于年轻患者(<36岁),当SDF≥30%时,受精卵着床率较高(P<0.05);对于36-40岁患者,两组患者实验室或临床结果中均未发现显着差异;对于高龄患者(>40岁),当SDF≥30%时,囊胚形成率降低(P<0.05)。结论:研究显示年轻女性患者与高SDF水平精子体外受精形成的胚胎种植率升高,而高龄女性患者与高SDF水平精子体外受精后囊胚形成率降低,但精子SDF水平可能不会影响IVF助孕患者的妊娠结局。展开更多
The pan-Arctic is confronted with air pollution transported from lower latitudes.Observations have shown that aerosols help increase plant photosynthesis through the diffuse radiation fertilization effects(DRFEs).Whil...The pan-Arctic is confronted with air pollution transported from lower latitudes.Observations have shown that aerosols help increase plant photosynthesis through the diffuse radiation fertilization effects(DRFEs).While such DRFEs have been explored at low to middle latitudes,the aerosol impacts on pan-Arctic ecosystems and the contributions by anthropogenic and natural emission sources remain less quantified.Here,we perform regional simulations at 0.2o×0.2ousing a well-validated vegetation model(Yale Interactive terrestrial Biosphere,YIBs)in combination with multi-source of observations to quantify the impacts of aerosol DRFEs on the net primary productivity(NPP)in the pan-Arctic during 2001-19.Results show that aerosol DRFEs increase pan-Arctic NPP by 2.19 Pg C(12.8%)yr^(-1)under clear-sky conditions,in which natural and anthropogenic sources contribute to 8.9% and 3.9%,respectively.Under all-sky conditions,such DRFEs are largely dampened by cloud to only 0.26 Pg C(1.24%)yr^(-1),with contributions of 0.65% by natural and 0.59% by anthropogenic species.Natural aerosols cause a positive NPP trend of 0.022% yr^(-1)following the increased fire activities in the pan-Arctic.In contrast,anthropogenic aerosols induce a negative trend of-0.01% yr^(-1)due to reduced emissions from the middle latitudes.Such trends in aerosol DRFEs show a turning point in the year of 2007 with more positive NPP trends by natural aerosols but negative NPP trends by anthropogenic aerosols thereafter.Though affected by modeling uncertainties,this study suggests a likely increasing impact of aerosols on terrestrial ecosystems in the pan-Arctic under global warming.展开更多
文摘目的:研究精子DNA片段化(sperm DNA fragmentation,SDF)水平对不同年龄女性行IVF助孕结局的影响。方法:本研究回顾性分析了2019年7月至2023年6月间于中山大学孙逸仙纪念医院生殖中心首次行IVF助孕患者的临床资料,共1773对夫妇。并通过精子染色质分散(Sperm Chromatin Dispersion,SCD)实验对男方射出的精子进行SDF水平检测。根据年龄将女性患者分为三个组:<36岁,36-40岁,>40岁;并在每个女性年龄分组中使用30%SDF作为临界点分为两个亚组。主要结局指标为胚胎着床率、临床妊娠率和流产率。结果:对于年轻患者(<36岁),当SDF≥30%时,受精卵着床率较高(P<0.05);对于36-40岁患者,两组患者实验室或临床结果中均未发现显着差异;对于高龄患者(>40岁),当SDF≥30%时,囊胚形成率降低(P<0.05)。结论:研究显示年轻女性患者与高SDF水平精子体外受精形成的胚胎种植率升高,而高龄女性患者与高SDF水平精子体外受精后囊胚形成率降低,但精子SDF水平可能不会影响IVF助孕患者的妊娠结局。
基金jointly supported by the National Key Research and Development Program of China(Grant No.2022YFE0106500)Jiangsu Science Fund for Distinguished Young Scholars(Grant No.BK20200040)。
文摘The pan-Arctic is confronted with air pollution transported from lower latitudes.Observations have shown that aerosols help increase plant photosynthesis through the diffuse radiation fertilization effects(DRFEs).While such DRFEs have been explored at low to middle latitudes,the aerosol impacts on pan-Arctic ecosystems and the contributions by anthropogenic and natural emission sources remain less quantified.Here,we perform regional simulations at 0.2o×0.2ousing a well-validated vegetation model(Yale Interactive terrestrial Biosphere,YIBs)in combination with multi-source of observations to quantify the impacts of aerosol DRFEs on the net primary productivity(NPP)in the pan-Arctic during 2001-19.Results show that aerosol DRFEs increase pan-Arctic NPP by 2.19 Pg C(12.8%)yr^(-1)under clear-sky conditions,in which natural and anthropogenic sources contribute to 8.9% and 3.9%,respectively.Under all-sky conditions,such DRFEs are largely dampened by cloud to only 0.26 Pg C(1.24%)yr^(-1),with contributions of 0.65% by natural and 0.59% by anthropogenic species.Natural aerosols cause a positive NPP trend of 0.022% yr^(-1)following the increased fire activities in the pan-Arctic.In contrast,anthropogenic aerosols induce a negative trend of-0.01% yr^(-1)due to reduced emissions from the middle latitudes.Such trends in aerosol DRFEs show a turning point in the year of 2007 with more positive NPP trends by natural aerosols but negative NPP trends by anthropogenic aerosols thereafter.Though affected by modeling uncertainties,this study suggests a likely increasing impact of aerosols on terrestrial ecosystems in the pan-Arctic under global warming.
