小于35岁助孕患者移植不同胚胎数的临床研究

目的:探讨35岁以下IVF-ET患者减少移植胚胎数对妊娠结局的影响。方法:选取2002.03-2004.10移植3枚胚胎与移植2枚胚胎患者151例,分析两组的单胚种植率、临床妊娠率和多胎率等。结果:35岁以下助孕患者移植3枚胚胎组与移植2枚胚胎组的单胚种植率和临床妊娠率分别是29.82%和30.00%,51.32%和48.00%,均无显著性差异(P>0.05),多胎率分别是53.85%和25.00%,差异显著(P<0.05)。结论:35岁以下IVF-ET患者减少移植胚胎数可在不影响临床妊娠率的情况下,有效降低多胎妊娠的发生。     

移植8cell胚胎个数与妊娠率的关系

目的:探讨体外受精-胚胎移植(IVF-ET)周期中第三天移植8cell胚胎数量与临床结局的关系。方法:以2009年1月至2010年12月在本中心接受IVF-ET治疗625个周期为研究对象。将所有移植周期按移植8cell胚胎个数分为三组,分析三组的临床妊娠率、胚胎种植率、多胎率有无差异。结果:移植两个8细胞胚胎组(C组)的临床妊娠率(59.5%)显著高于无8细胞胚胎移植组(A组)和含一个8细胞组(B组)(P<0.05),A、B两组临床妊娠率无显著性差异;C组种植率(39.8%)显著高于其他两组,A组和移植胚胎中含一个8细胞组(B组)种植率比较有显著性差异,;多胎率分析,C组明显高于其他两组。结论:在IVF-ET周期中第3天移植8cell胚胎个数对妊娠率及种植率、多胎率有影响,在挑选胚胎时移植一个8cell胚胎搭配一个其他细胞数的胚胎也能得到较好的妊娠率并有效降低多胎率。     

移植8cell胚胎个数与妊娠率的关系

目的:探讨体外受精-胚胎移植(IVF-ET)周期中第三天移植8cell胚胎数量与临床结局的关系。方法:以2009年1月至2010年12月在本中心接受IVF-ET治疗625个周期为研究对象。将所有移植周期按移植8cell胚胎个数分为三组,分析三组的临床妊娠率、胚胎种植率、多胎率有无差异。结果:移植两个8细胞胚胎组(C组)的临床妊娠率(59.5%)显著高于无8细胞胚胎移植组(A组)和含一个8细胞组(B组)(P<0.05),A、B两组临床妊娠率无显著性差异;C组种植率(39.8%)显著高于其他两组,A组和移植胚胎中含一个8细胞组(B组)种植率比较有显著性差异,;多胎率分析,C组明显高于其他两组。结论:在IVF-ET周期中第3天移植8cell胚胎个数对妊娠率及种植率、多胎率有影响,在挑选胚胎时移植一个8cell胚胎搭配一个其他细胞数的胚胎也能得到较好的妊娠率并有效降低多胎率。     

冻融胚胎移植3种内膜准备方案成功妊娠者的临床比较

目的:探讨冻融胚胎移植(FET)3种内膜准备方案成功妊娠者的临床特征。方法:回顾性分析188个FET周期,其中98个成功妊娠,比较自然周期(A组,n=42)、激素替代周期(B组,n=46)和促排卵周期(C组,n=10)这3种方案成功妊娠者在年龄、移植日及移植第4日血清激素水平、移植胚胎数、I级胚胎比例、移植位置和黄体酮的用量的影响上是否存在差异。结果:1 B组移植日、移植第4日血清E2水平、E2/P值、黄体酮的用量均明显高于A组,而P水平明显低于A组,差异均有统计学意义(P0.05);年龄、移植胚胎数、I级胚胎比例及移植位置上A、B无统计学差异(P0.05)。2 C组可移植胚胎数明显少于A组和B组,差异均有统计学意义(P0.05);而在年龄、移植日及移植第4日血清激素水平、I级胚胎比例、移植位置和黄体酮的用量与A组和B组间无统计学差异(P0.05)。结论:B组方案者黄体支持时黄体酮的用量应高于A组,B组方案在移植日及移植第4日孕酮值低于A组,但并不影响妊娠,C组方案者可移植胚胎数减少可能并不影响妊娠率。     

不同胚胎选择体系对IVF-ET妊娠结局的影响

目的:探讨IVF-ET周期中不同胚胎选择体系对妊娠结局的影响。方法:将530个IVF-ET周期随机分为3组,按不同的胚胎选择方法选择胚胎进行移植。A组:228个移植周期,根据d3胚胎常规评分方法选择胚胎;B组:140个移植周期,根据d3胚胎常规评分结合原核评分选择胚胎;C组:162个移植周期,根据d3胚胎常规评分结合胚胎早期分裂选择胚胎。将C组进一步分为移植胚胎中有早裂胚胎和无早裂胚胎二组。比较各组的临床妊娠率和单胚着床率。结果:B组的临床妊娠率和单胚种植率为37.86%和21.77%,与A组(33.33%和20.56%)比均无统计学差异(P>0.05);而C组(45.06%和30.88%)均显著高于A组(P<0.05);C组移植胚胎中有早裂胚胎者的临床妊娠率和单胚着床率为55.68%和38.38%,分别显著高于移植胚胎中不含早裂胚胎者(32.43%和21.94%)(P<0.05)。结论:d3胚胎常规评分结合胚胎早期分裂选择的胚胎移植,可以提高IVF-ET周期的临床妊娠率和单胚着床率。     

IVF/ICSI周期中不同移植方案的临床结局及经济学分析

目的:探讨IVF/ICSI周期中第三天可利用胚胎为5枚以上的患者选择不同移植方案的临床结局及经济学评价。方法:选取2014年1月至2015年12月于郑州大学第三附属医院生殖医学中心行IVF/ICSI-ET治疗不孕症的1400例周期,按移植方案分为3组:移植D3胚胎(A组,1109个周期),非选择性囊胚移植组(B组,160个周期),选择性(单)囊胚移植组(C组,131个周期)。分析各组的临床结局和经济学成本。结果:A组患者的获卵数和种植率均明显低于B组和C组,差异均有统计学意义(P0.05);3组患者的2PN受精率、卵裂率、可移植胚胎率、优质胚胎率、临床妊娠率和流产率比较,差异均无统计学意义(P0.05)。A组患者的多胎率明显高于B组和C组(P均=0.000),且B组明显高于C组(P=0.000)。C组患者移植的成本效果比最小。结论:3组移植方案的临床妊娠率相似;选择性单囊胚移植明显提高胚胎种植率,降低多胎率,治疗成本效果比最小,是相对最佳的移植方案。     

输卵管积水抽吸术在体外受精-胚胎移植中的意义

目的:评价输卵管积水抽吸术在输卵管积水患者行体外受精-胚胎移植(IVF-ET)中的意义。方法:回顾性分析2005年1月~2009年12月在广州医学院第三附属医院生殖中心因输卵管因素不孕症行IVF-ET治疗的患者资料1029例(1190个周期),分为输卵管积水抽吸组(A组)75例(88个周期)、输卵管积水组(B组)49例(60个周期)和双侧输卵管阻塞组(C组)905例(1042个周期)。结果:3组患者Gn总量、超排天数、移植胚胎数、冷冻胚胎数差异均无统计学意义(P>0.05)。3组间受精率、胚胎种植率、移植取消率、临床妊娠率、多胎妊娠率、中晚期流产率、异位妊娠率差异均无统计学意义(P>0.0167)。A、B两组HCG日直径>12mm的卵泡数、获卵数均少于C组(P<0.05),A、B两组差异无统计学意义(P>0.05);A组生化妊娠率、早期流产率高于C组(P<0.0167),B、C组差异无统计学意义(P>0.0167)。结论:取卵时经阴道输卵管积水抽吸术没有改变输卵管积水患者临床妊娠率低、早期流产率高的结局。     

D3仅一枚优质胚胎患者新鲜周期不同移植方案的临床结局分析

目的:探讨D3仅一枚优质胚胎患者新鲜周期不同移植方案的临床结局。方法:回顾分析2014年1月至2016年12月在山东大学附属生殖医院接受体外受精-胚胎移植(IVF-ET)治疗周期的第3天(D3)仅一枚优质胚胎的3286例患者,其中2677例新鲜周期移植。根据正常受精数分为3组:A组仅有一枚正常受精胚胎;B组仅有两枚正常受精胚胎;C组大于两枚正常受精胚胎。将3组患者按移植方案再分为3组:第三天移植一枚卵裂期胚胎(D3-1组);第三天移植两枚卵裂期胚胎(D3-2组);第五天移植一枚囊胚(D5-1组)。分别比较3组患者不同移植方案的临床结局。结果:A组中,D3-1组和D5-1组的临床妊娠率、胚胎着床率、早期流产率、多胎妊娠率方面均无显著差异(P0.05);B组中,D3-2组的临床妊娠率和多胎妊娠率均高于D3-1组(48.59%vs 33.73%,19.88%vs0,P0.01);C组中,D3-2组的临床妊娠率和多胎妊娠率均高于D3-1组(52.88%vs 40.24%,34.34%vs 0,P0.01),D3-2组的胚胎着床率低于D5-1组(34.95%vs 46.43%,P0.01),D3-2组的多胎妊娠率高于D5-1组(34.34%vs 1.56%,P0.01);D5有优质囊胚形成周期占比方面:C组高于A组和B组(68.93%vs 46.70%和56.67%,P0.01);放弃周期率方面:C组低于A组和B组(13.79%vs 32.42%和28.0%,P0.01)。结论:对于D3仅一枚优质胚胎的患者,移植一枚胚胎可显著降低多胎妊娠率;D5移植降低了胚胎的利用效率;D3移植两枚卵裂期胚胎比移植一枚卵裂期胚胎可获得更高的临床妊娠率;当正常受精胚胎数大于两枚时,D5移植可以获得更高的种植率。     

两种控制性超促排卵方案在卵巢低反应患者中的临床研究

目的:探讨标准长方案与拮抗剂方案控制性超促排卵(COH)周期在卵巢低反应(POR)患者中的临床效果。方法:通过对POR患者行体外受精-胚胎移植(IVF-ET)的191个周期进行回顾性分析,其中GnRH-a长方案85个周期(A组),拮抗剂方案106个周期(B组),比较组间的临床资料及助孕结局。结果:A组的hCG注射日内膜厚度、获卵数、MII卵子数、可移植胚胎数、活产分娩率均高于B组,差异有统计学意义(P0.05);A组的优质胚胎数、胚胎种植率、移植周期妊娠率均高于B组,A组的周期取消率、流产率均低于B组,但差异均无统计学意义(P0.05)。结论:标准长方案对卵巢低反应患者有较好的治疗效果;标准长方案可提高患者获卵数、可移植胚胎数、活产分娩率。     

不同预处理促性腺激素拮抗剂方案在超促排卵中应用的临床分析

目的:探讨如何在体外受精-胚胎移植(IVF-ET)周期中更有效地运用拮抗剂方案。方法:回顾性分析319个使用拮抗剂方案进行IVF-ET无输卵管积液、无内膜息肉及无子宫解剖结构异常的新鲜移植周期。根据拮抗剂治疗前使用短效激动剂(n=125,A组)、口服避孕药(达英-35)(n=113,B组)和未处理组(n=81,C组)分组,比较各组患者的年龄、促性腺激素(Gn)使用天数和剂量、注射hCG日LH和E2水平、获卵数、优质胚胎率、临床妊娠率等。同时以261个促性腺激素激动剂长方案移植周期为对照组(D组)作进一步对比。结果:C组年龄(32.9±4.8岁)较其它组年龄明显偏大,P<0.05;A和B组Gn使用剂量大于C组,其中A组明显增多(P<0.01);A和B组hCG注射日LH水平均较C组明显低,其中A组LH值最低(P<0.01);A组获卵数最多(P<0.05);B组子宫内膜最薄(P<0.01)。3组的受精率、优质胚胎率均无统计学差异(P>0.05)。A组、B组和C组临床妊娠率分别为:32.8%、17.7%和37.0%,B组临床妊娠率显著低于A、C组(P<0.01)。C组、D组间临床妊娠率比较无统计学差异(37.0%vs 40.2%,P>0.05);C组Gn使用的时间和剂量均比D组明显减少(P<0.05)。结论:在IVF-ET中GnRH拮抗剂治疗前使用达必佳预处理未能提高妊娠率,使用过达因-35避孕的患者妊娠率明显下降,而未使用任何药物的患者接受GnRH拮抗剂超促排卵方案,能获得比较好的临床结局。     

Comparison of cryopreservation outcome following intracytoplasmic sperm injection and conventional in vitro fertilization

Purpose Our purpose was to compare the success rate of transferring frozen-thawed embryos generated from either intracytoplasmic sperm injection (ICSI) or conventional in vitro fertilization (IVF). Methods A retrospective review of all frozen—thawed embryo transfer (ET) cycles between January 1995 and April 1997 was performed. There were 83 and 204 transfer cycles of frozen — thawed multicellular embryos generated from conventional IVF (group A) and ICSI (group B), respectively. The survival rate of frozen — thawed embryos and the outcome following ET in both groups were assessed. Results The groups did not differ in age (31.7±4.6 and 30.6±6.0; mean±SD) or number of embryos transferred (3.5±1.1 and 3.8±1.3 for groups A and B, respectively). An acceptable pregnancy rate per ET was achieved in both groups, but the rate was significantly higher (P = 0.04) for group A than group B, 32.5 and 20%, respectively. Group A included frozen embryos of a higher quality than those of group B, but the proportion of embryos surviving after thawing was significantly higher for group B than group A (92.5 and 85.6%, respectively; P = 0.0004). The abortion rate did not differ between the two groups: 22 and 26.8% for groups A and B, respectively. Conclusions Although an overall high pregnancy rate was achieved following frozen-thawed ET, it was lower for cycles in which embryos had been generated from ICSI. This difference may be attributed to a lower prefreezing embryo quality in the ICSI group. Embryos originating from ICSI were not vulnerable to cryopreservation and, when implanted, resulted in a comparable abortion rate to thawed embryos of conventional IVF.     

Day 3 ET,single blastocyst transfer (SBT) or frozen-thawed embryo transfer (FET): which is preferable for high responder patients in IVF/ICSI cycles?

Purpose

To compare the clinical outcomes after day 3 embryo transfer, day 5 single blastocyst transfer (SBT) and frozen-thawed embryo transfer (FET) in high responder patients (>15 retrieved oocytes) undergoing IVF/ICSI treatment.

Methods

A retrospective analysis of three embryo transfer strategies for the high responder patients in IVF/ICSI cycles. The 1041 high responder patients diagnosed as primary infertility with more than 15 oocytes retrieved were recruited in Day 3 ET group, 308 patients with more than 15 oocytes retrieved first transferred with one blastocyst in SBT group and 425 patients with more than 15 oocytes retrieved in fresh cycle, first transferred with one frozen-thawed blastocyst were assigned in FET group.

Results

In the high responder patients, the clinical pregnancy rate after day 5 SBT was significantly lower than that of day 3 ET (43.18 % VS 57.16 %, p < 0.05). In addition, the clinical pregnant rate and implantation rate of FET cycles were significantly higher than SBT cycles (59.06 % vs. 43.18 % and 64.70 % vs. 47.40 %, p < 0.05). The multiple pregnancy rate in FET cycles was markedly lower than that of day 3 ET (2.35 % VS 34.97 %, p < 0.05).

Conclusions

FET was the preferable strategy for the high responder patients in IVF/ICSI cycles to obtain both desirable clinical outcome and lower multiple pregnancy rates.     

冻融胚胎移植术用于补救卵胞浆内单精子注射治疗周期的临床价值

目的：探讨冻融胚胎移植在补救卵胞浆内单精子注射（ICSI）治疗周期中的临床价值。方法：回顾分析常规体外受精完全失败的306个周期,根据补救ICSI的时间不同分为6～8h补救ICSI组（A组）和18～20h补救ICSI组（B组）,其中行新鲜胚胎移植且有胚胎冷冻的分别记为AI组（n=108）和BI组（n=51）,随后行冻融胚胎移植的分别记为AⅡ组（n：74）和BⅡ组（n=46）,观察各组的妊娠结局。结果：A组正常受精率、卵裂率、优质胚胎率和临床妊娠率均明显高于B组（P〈0．05）;BⅡ组临床妊娠率和胚胎种植率明显高于BI组（32．61％VS11．76％,15．08％VS5．04％,P〈0．05）;AII组临床妊娠率和胚胎种植率较AI组高（44．59％VS34．26％,21．86％VS19．40％）,但无明显的统计学差异（P〉0．05）。结论：合理的补救时间是影响补救ICSI结局的关键因素,进一步的冻融胚胎移植可以改善补救ICSI治疗周期的妊娠结局。     

Embryo developmental stage at transfer influences outcome of treatment with intracytoplasmic sperm injection

Purpose: Our purpose was to determine if embryo cell stage at the time of intrauterine transfer correlates with pregnancy rate in patients treated with intracytoplasmic sperm injection (ICSI). Methods: We conducted a retrospective analysis of 455 embryo transfer cycles following ICSI and 304 conventional in vitro fertilization (IVF) and embryo transfer cycles in women aged 40 years or less. Abstracted information included grading of the embryo cell stage and quality at the time of transfer. Results: The overall ICSI pregnancy rate was 30.8%, while that of conventional IVF was 29.3%. However, the ICSI pregnancy rate fell to 9.3% for embryo transfers taking place at the two-cell stage but increased to 35.8% when at least one embryo had more than two cells, and this difference was statistically significant (P≤0.0001). The pregnancy rate following conventional IVF was 22.0% when only two-cell embryos were transferred and 32.0% when at least one of the embryos had more than two cells, but this difference in pregnancy rates was not significant (P>0.05). Conclusions: The stage of embryo development at transfer appears to exert a powerful influence on the successful establishment of pregnancy after ICSI.     

体外受精-胚胎移植中胚胎形态和发育时期与受孕结果的相关性

目的 :观察胚胎形态和发育速度对体外受精 -胚胎移植 ( IVF-ET)治疗结果的影响。方法 :35 4对夫妇进行的 371个 IVF-ET治疗周期 ( ICSI177个周期 ,常规 IVF 194个周期 ) ,根据移植胚胎形态等级将 IVF-ET周期分为 A、B、C、D 4组 ;再根据移植胚胎中有无≥ 4-细胞期胚胎将 IVF-ET周期分为≥ 4-细胞期胚胎组和 <4-细胞期胚胎 2组 ,分析移植胚胎形态等级和卵裂期对胚胎种植率和临床妊娠率的影响。结果 :371个周期共移植 112 5个新鲜胚胎 ,四个形态等级胚胎组之间种植率 ( P=0 .0 12 )和妊娠率 ( P=0 .0 0 6)差别有显著性。两个卵裂期胚胎组之间种植率 ( P=0 .0 0 7)和妊娠率 ( P=0 .0 10 )有显著性差异。 L ogistic回归分析发现胚胎质量 (形态等级 P=0 .0 0 38,卵裂期 P=0 .0 0 45 )是影响临床妊娠结果的因素。结论 :移植胚胎的形态和发育期与胚胎种植率及临床妊娠率密切相关     

体外受精-胚胎移植周期透明带透亮致密患者的受精与临床结局

目的：探讨卵子透明带透亮致密患者行常规体外受精（IVF）或卵胞质内单精子显微注射（ICSI）后受精、胚胎发育情况及临床结局。方法：回顾性分析体外受精过程中卵子出现透明带透亮致密的43个周期,其中IvF周期27例,ICSI周期16例,比较受精率与正常受精比例、胚胎质量、临床妊娠结局。结果：27例IVF周期均未受精,行早期补救ICSI,其中23例完全不受精。补救后IVF总体受精率达64．83％,正常受精率59.32％;16例ICSI周期均受精,受精率和正常受精率分别为85．11％和79．01％,均显著高于IVF组（P〈0．05）。IVF组和ICSI组卵裂率分别为97．96％、95．65％,优质胚胎率分别为52．67％、43．75％,组间差异无统计学意义（P〉0．05）。IVF组妊娠率为37．04％,种植率为33．33％;ICSI组妊娠率为31．25％,种植率为25．00％,组间临床结局相近,无统计学差异（P〉0．05）。结论：透明带透亮致密患者的自然受精能力下降,需要采用ICSI方式授精。常规IVF受精失败后采用早期补救ICSI或直接行ICSI能明显改善透明带透亮致密患者的受精结局,但不能改善妊娠结局。     

探讨辅助孵化在既往种植失败患者解冻周期中的合理化应用

目的:探讨在既往胚胎种植失败患者的解冻周期中如何合理化应用辅助孵化(AH)。方法:本研究共纳入了579名既往种植失败的患者,其中242例行激光AH(LAH组),337例未行AH(对照组)。比较组间临床妊娠率、种植率及活产率等;另根据患者的年龄、既往移植次数、胚胎评分及移植胚胎受精方式再进行分组,比较不同组别的妊娠结局。结果:妊娠率、种植率及活产率在LAH组与对照组组间无统计学差异(P0.05),但分组分析结果显示,既往移植次数2次的患者以及移植卵泡质内单精子显微注射(ICSI)胚胎的患者,LAH能显著提高活产率(25.5%vs 5.3%;37.0%vs 23.9%,P0.05)。结论:LAH并不适合作为解冻胚胎移植的常规移植策略,但对于既往移植次数2次的未孕者及移植ICSI胚胎的患者,LAH能明显改善妊娠结局。     

成熟卵泡获卵率对体外受精结局的影响

目的比较在体外受精-胚胎移植/卵细胞浆内单精子注射（IVF-ET/ICSI）过程中,控制性超促排卵（COH）后成熟卵泡获卵率对IVF-ET/ICSI的实验室和临床结局的影响。方法回顾性分析2010年5月至2010年12月四川大学华西第二医院行IVF-ET/ICSI治疗的693例患者,共746个周期,根据获卵率将患者分为A组：获卵率≥80%;B组：获卵率50%～79%;C组：获卵率30%～49%;D组：获卵率〈30%。比较4组患者的临床和实验室结局。结果 A、B组卵子成熟率、受精率、卵裂率和可移植胚胎形成率等各项临床和实验室结局比较,差异均无统计学意义（P〉0.05）。随着获卵数的减少,获卵数最低的D组的卵子成熟率、受精率、卵裂率和可移植胚胎形成率与A组和B组比较,差异有统计学意义（P〈0.05）;同时,D组的临床妊娠率、胚胎种植率和累积妊娠率明显低于其他各组（P〈0.05）。C组受精率、卵裂率、可移植胚胎形成率和临床妊娠率也显著低于A组（P〈0.05）,C组卵裂率、临床妊娠率低于B组（P〈0.05）,但C组的累积妊娠率与A组和B组相似（P〉0.05）。结论获卵率减少可导致卵子成熟率、受精率、卵裂率和可移植胚胎形成率下降,直接导致临床妊娠率下降。     

卵母细胞滑面内质网聚集对早期胚胎及妊娠结局的影响

目的:研究卵胞浆内精子注射(ICSI)周期卵母细胞滑面内质网(sER)聚集对早期胚胎体外发育及妊娠结局的影响并分析其原因。方法:99例患者ICSI治疗107个周期,于HCG日测定血清激素E2、P、LH浓度以及子宫内膜厚度。根据所获MⅡ期卵母细胞是否出现sER聚集分为A、B两组,A组为所获MⅡ期卵母细胞均未出现sER聚集周期共90例;B组为有至少一枚MⅡ期卵母细胞出现sER聚集周期,共17例。比较A、B两组HCG日E2、P、LH水平、子宫内膜厚度,及治疗周期数、年龄、病程、Gn总量、Gn天数、获卵数、受精率、可用胚胎率、优质胚胎率、移植胚胎数、周期临床妊娠率、种植率、流产率和原发、继发不孕患者比例的差异。并且对比B组sER聚集阳性[sER(+)]与sER聚集阴性[sER(-)]卵母细胞的受精率、可用胚胎率和优质胚胎率。结果:B组HCG日E2水平明显高于A组(P<0.05,3141.18±604.47 vs 2635.12±825.46),而两组间P和LH水平以及子宫内膜厚度均无显著差异(P>0.05)。B组优质胚胎率显著低于A组(P<0.05,47.83%vs 57.67%),而B组Gn天数(P<0.01,13.35±1.66 vs 11.83±2.4)和流产率(P<0.05,100%vs 17.86%)均明显高于A组,两组在年龄、治疗周期数、病程、Gn总量、获卵数、受精率、可用胚胎率、移植胚胎数、临床妊娠率、种植率以及原发、继发不孕患者比例等各方面均无显著差异(P>0.05)。B组sER(+)卵母细胞的优质胚胎率显著低于sER-卵母细胞(P<0.01,20.69%vs 52.9%),而受精率和可用胚胎率无显著性差异(P>0.05)。结论:ICSI周期卵母细胞sER聚集对早期胚胎体外发育及妊娠结局均有不良影响,sER聚集可能与HCG日高E2水平及长时间Gn刺激有关。     

Comparing the effect of sequential embryo transfer versus double blastocyst embryo transfer on pregnancy outcomes in intracytoplasmic sperm injection (ICSI) cycles in patients with repeated implantation failure: A randomized controlled trial

ObjectiveRecurrent implantation failure (RIF) is the main challenge in assisted reproductive technology (ART) practice. Sequential embryo transfer, in which both, cleavage-stage embryo on day 3 and blastocyst on day 5, are sequentially transferred in the same cycle, has been suggested for increasing embryo implantation in RIF patients. The aim of the present study was to compare the effect of sequential embryo transfer versus double blastocyst embryo transfer on pregnancy outcomes in intracytoplasmic sperm injection (ICSI)/frozen embryo transfer (FET) cycles in RIF patients.Materials and methodsThis prospective study was enrolled 224 RIF patients undergoing ICSI/FET cycles and randomly divided to sequential and control groups. In sequential group, embryo transfer was conducted on day 3 (cleavage stage) and day 5 (blastocyst stage). In control group, two top-quality blastocysts were transferred on day 5.ResultsTwo hundred and two couples accomplished the trial, and their data were analyzed. Results demonstrated that sequential embryo transfer on day 3 and day 5 compared to double blastocyst transfer on day 5 significantly increased implantation rate, clinical pregnancy rate and ongoing pregnancy rate in RIF patients (p-value = 0.0142, p-value = 0.0154, p-value = 0.0201, respectively). However, there were no significant differences in terms of chemical pregnancy rate, multiple pregnancy rate, miscarriage rate and ectopic pregnancy rate in the studied groups.ConclusionSequential embryo transfer is associated with improved pregnancy outcomes in RIF patients. Further prospective studies with larger sample sizes are required to validate these results.