简介：AbstractObjective:To investigate cumulative live birth rate (cLBR) per oocyte retrieval in infertile patients aged 40 years and over undergoing their first in vitro fertilization/intracytoplasmic sperm injection cycles and to identify the possible predictors.Methods:A total of 1,613 patients at a university hospital in China from January 2013 to May 2017 were enrolled in this retrospective study. All data for fresh and subsequent frozen-thawed cycles were analyzed. Multivariate logistic regression analysis with stepwise selection of possible predictors for cLBR was performed, and Loess curve was constructed to determine the association between cLBR and the number of oocytes retrieved.Results:cLBR significantly increased with the number of oocytes retrieved and reached up to 75% when > 20 oocytes were retrieved (P < 0.001). Variables of antral follicle count (AFC) and the number of oocytes retrieved were selected using multiple logistic regression analysis with stepwise selection to predict the significance of cLBR. cLBR demonstrated an obvious upward trend as the number of oocytes retrieval increased in the Loess curve.Conclusions:For patients aged 40 years and over, AFC and the number of oocytes retrieved were two key predictors for cLBR and maximization of ovarian reserve exploitation was pivotal to increase the chance of live birth.

简介：无

简介：无

简介：AbstractBackground:More and more scholars have called for the cumulative live birth rate (CLBR) of a complete ovarian stimulation cycle as a key indicator for assisted reproductive technology. This research aims to study the CLBR of the first ovarian hyperstimulation cycles and analyze the related prognosis factors that might affect the CLBR.Methods:Our retrospective study included first in vitro fertilization or intracytoplasmic sperm injection (IVF/ICSI) cycles performed between January 2013 to December 2014. A total of 17,978 couples of first ovarian hyperstimulation IVF/ICSI cycles were included. The study was followed up for 4 years to observe the CLBR. The multivariable logistic regression model was used to analyze the prognosis factor, P value of <0.05 was considered statistically significant.Results:The cumulative pregnancy rate was 58.14% (10,452/17,978), and the CLBR was 49.66% (8928/17,978). The female age was younger in the live birth group when compared with the non-live birth group (30.81 ± 4.05 vs. 33.09 ± 5.13, P < 0.001). The average duration of infertility was shorter than the non-live birth cohort (4.22 ± 3.11 vs. 5.06 ± 4.08, P < 0.001). The preliminary gonadotropin used and the total number of gonadotropin used were lower in the live birth group when compared with the non-live birth group (both P < 0.001). Meanwhile, the number of oocytes retrieved and transferrable embryos were both significantly higher in the live birth group (15.35 ± 7.98 vs. 11.35 ± 7.60, P < 0.001; 6.66 ± 5.19 vs. 3.62 ± 3.51, P < 0.001, respectively).Conclusions:The women’s age, body mass index, duration of infertility years, infertility factors, controlled ovarian hyperstimulation protocol, the number of acquired oocytes, and number of transferrable embryos are the prognosis factors that significantly affected the CLBR.

简介：Peer-to-peer(P2P)technologyprovidesacost-effectiveandscalablewaytodistributevideodata.However,highheterogeneityoftheP2Pnetwork,whichrisesnotonlyfromheterogeneouslinkcapacitybetweenpeersbutalsofromdynamicvariationofavailablebandwidth,bringsforwardgreatchallengetovideostreaming.Toattackthisproblem,anadaptiveschemebasedonrate-distortionoptimization(RDO)isproposedinthispaper.WhilelowcomplexityRDObasedframedroppingisexploitedtoshapebitrateintoavailablebandwidthinpeers,thestreamedbitstreamisdynamicallyswitchedamongmultipleavailableversionsinanRDOwaybythestreamingserver.SimulationresultsshowthattheproposedschemebasedonRDOachievesgreatgaininoverallperceivedqualityoversimpleheuristicschemes.

简介：

简介：当纽约世贸大厦被熊熊烈焰吞噬之际，劳伦绝处逢生躲过一劫。尽管她全身烧伤面积高达82％，但她凭着对未来的憧憬，对生活的热爱，顽强地同死神拼搏。前总统夫人、参议员希拉里·克林顿看望了劳伦，并赞誉她是妇女的楷模。

简介：ASpecializedCommitteeofREInforma-tionundertheChineseRESocietyhasbeenformedwiththepurposeofstreng-theningtheexchangeofREinformationandpromotingthedevelopmentofREsci-enceandtechnologyathomeandabroad.ThefirstmeetingofthecommitteewasheldinBeijingonDecember23-25,1989,andwasattendedbyover100representa-tivesfromuniversitiesandscientificresearchinstitutionsinvariouspartsofChina.Amongthemweresomewell-knownscholarswhohavelongbeenengagedin

简介：In1946,WorldWarⅡhadjustrecentlyended.Moreandmorepeoplewerefloodingtosportingevents,especiallycollegebasketball.MaxKase,asportseditoroftheNewYorktoldtheowneroftheNationalHockeyLeague,WalterBrown,abouthisidea,andBrowntookthei-deatoNedIrish.Nedstatedhewasalreadyworkingonsuchaleague,andKasedideventuallyreceiveseveralthousanddollarsforhisefforts.

简介：

简介：ArtQuaifeisascientist,Heisalsoabusinessman.Hisbusinessisfreezingpeople.HeworksforacompanyinCaliforniacalledTransTime.TransTimefreezespeopleaftertheydie.

简介：聆听光碟，看看这五位来自英格兰的小朋友分别住在哪个城市。试配对图片，把相关图片编号及城市的名称填在句子里。

简介：蜘蛛成功的主要原因是在于它们产出的丝和它们使用丝的方法。蜘蛛丝主要由蛋白质构成。它以液体的形式从蜘蛛体内流出来，遇到空气后立即变硬，且不溶于水。丝的质地非常坚韧，能被拉长并超出其原来长度的三分之一，接着又砰地一声回复到它原来的长度而不改变形状：

简介：更多色彩、更加环保、更省成本Believeitonnot!2008年5月27日,惠普在新加坡举办了2008年度的HPPrintWatchLive研讨会,会上发布了诸多打印机、耗材与墨盒的新技术新产品。本次活动以Color(色彩)、Green(环保)和Value&Choice(成本)为主轴,我们不仅仅了解到惠普最新、最快速的打印机产品,还近距离了解到创新的打印技术如何帮助用户提高效率节省成本,以及针对环保的举措。

简介：

简介：Thedemographicstructureofpopulations,particularlyageandsex,hasprofoundconsequencesforharmoniousandsustainablesocialandeconomicdevelopment.Furthermore,analyzingsexratiosofpopulationsisimportantinanalyzingthedevelopmentofthestatusOfwomenandgirls.

简介：

简介：

简介：一、live作动词1．作不及物动词（1）表示“居住；住”的意思，常接介词短语或副词短语（overthere），还可接表示地点的副词，如here，there等等。例如：

简介：