Half-ICSI与备早补救ICSI在可疑体外受精周期失败中的应用

目的:比较half-ICSI与备早补救ICSI 2种授精方式在体外受精周期中的应用价值。方法:选取可疑受精失败的不孕患者,随机分为half-ICSI组(A组,half-ICSI授精,138个周期)和行备早补救ICSI组(B组,行备早补救ICSI授精,112个周期)。分析受精率、胚胎质量、种植率和妊娠率。结果:A组与B组的正常受精率分别为65.37%和70.78%,多精受精率分别为1.59%和3.08%,优质胚胎率分别为66.76%和73.75%,胚胎种植率分别为26.64%和35.59%,组间均有统计学差异(P<0.05);妊娠率分别为46.09%和57.84%,组间无统计学差异(P>0.05)。其中在IVF受精成功周期中,A组的优质胚胎率、胚胎种植率和临床妊娠率均明显低于B组(P<0.05);而在IVF受精失败周期中,ICSI的优质胚胎率、胚胎种植率和临床妊娠率A、B组间均无差异(P>0.05),但A组的受精率显著低于B组(P<0.01)。结论:备早补救ICSI授精方式优于half-ICSI授精方式,但有增加多精受精的风险。     

非男性因素不孕体外受精失败行卵胞浆内单精子注射的结局分析

目的:探讨卵胞浆内单精子注射(ICSI)对非男性因素不孕IVF失败患者治疗结局的影响。方法:回顾性分析由于第一周期常规IVF治疗中卵子完全不受精或受精率≤25%,行补救性ICSI的10个周期(补救性ICSI组),以及因前次受精失败而在随后的治疗周期中采取ICSI方法受精的19个周期(后续性ICSI组)的ICSI治疗结局,并以因男方少弱精子症进行第1次ICSI治疗的133个周期为对照组。结果:后续性ICSI组受精率、植入率、妊娠率和分娩率均高于补救性ICSI组,但差异均无统计学意义(P>0.05)。后续性ICSI组优胚率显著高于补救性ICSI组(P<0.05);补救性ICSI组受精率(48.9%)、优质胚胎率(29.2%)、植入率(0%)、妊娠率(0%)、分娩率(0%)均显著低于对照组(分别为72.1%、46.6%、21.2%、45.1%、39.1%);后续性ICSI组受精率、植入率、妊娠率、分娩率分别为55.4%、8.8%、21.1%、15.8%,均低于对照组(P<0.05或P<0.01)。优质胚胎率后续性ICSI组(44.2%)低于对照组,但无统计学差异。结论:对于非男性因素不孕IVF失败患者,ICSI能避免受精失败,但是受精率以及妊娠结局受到卵母细胞隐匿性异常的影响。     

对体外受精失败后不同授精时间进行补救ICSI的结局比较

目的:探讨初次体外受精(in vitro fertilization,IVF)失败后不同时间进行补救单精子卵胞浆内注射(intracytoplasmic sperm injection,ICSI)授精对胚胎发育潜力及妊娠结局的影响。方法:将104例完全不受精或低受精率的常规IVF周期分为6 h后行补救ICSI短时授精组(A组,再将A组按补救ICSI时间分为6～8 h的A1组和8.1～12 h的A2组)及晚时授精(22 h后行补救ICSI)组(B组),比较各组间的治疗结局。结果:A组总的卵裂率、可移植胚胎率、优质胚胎率、妊娠率与B组相比差异显著(P<0.05)。A1组与A2组相比,受精率、卵裂率、可移植胚胎率、优质胚胎率无显著差异,妊娠率差异显著(P<0.05)。结论:缩短卵龄有利于补救ICSI结局的改善。     

half-ICSI中IVF受精率的差异对临床结局的影响

目的:比较行half-ICSI治疗中IVF受精率的差异对half-ICSI治疗结局的影响。方法:回顾性分析配偶精液分析处于临界状态,无法排除受精失败可能的患者,以及前次IVF受精失败的患者,采用half-ICSI治疗,并根据IVF部分的受精情况进行分组,其中IVF受精失败(定义为IVF受精率≤25%)的half-ICSI组为研究组,包括IVF受精率为0的完全受精失败half-ICSI组24个周期及IVF受精率低下的half-ICSI组19个周期;而IVF正常受精(定义为IVF受精率≥65%)的half-ICSI组19个周期作为对照组。结果:IVF完全受精失败的half-ICSI组中ICSI的受精率、卵裂率、优质胚胎率、植入率、妊娠率、分娩率、流产率分别为68.94%、95.50%、53.77%、19.23%、33.33%、33.33%、0%,IVF受精率低下的half-ICSI组ICSI的受精率、卵裂率、优质胚胎率、植入率、妊娠率、分娩率、流产率分别为71.43%、94.4%、52.54%、18.75%、36.84%、31.58%、14.29%,与对照组即IVF正常受精的half-ICSI组(分别为81.34%、97.25%、55.66%、21.74%、36.84%、36.84%、0%)相比,除受精率研究组与对照组有显著差异外(P<0.05),其余各率差异均无差异(P>0.05)。3组精液分析也无统计学差异。结论:half-ICSI中IVF受精失败将影响ICSI的受精率,但是对胚胎发育及妊娠结局并无显著影响。     

体外受精失败后补行卵胞浆内单精子注射的临床价值探讨

目的:探讨卵胞浆内单精子注射(ICSI)在体外受精完全失败或受精率低于25%的常规IVF周期中的临床价值。方法:回顾分析2001.01-2004.12在我院生殖医学中心接受常规IVF治疗的35例非男性因素不育患者,取卵后体外受精培养16-18h,发现卵母细胞完全未受精或受精率低于25%,立即行ICSI再授精。结果:在24个常规IVF低于25%的周期中,共有197个未受精卵,其中159个MⅡ期卵,显微注射159个,受精123个,最终形成胚胎96个,受精率为77.4%,卵裂率为78.1%,在22个新鲜移植周期(每周期的移植胚胎由来源于常规体外受精卵和补救ICSI后受精卵的胚胎组成),共有4例临床妊娠;在8个冷冻移植周期中(每周期的移植胚胎完全来源于补救ICSI后的受精卵),有1例临床妊娠。在11个常规IVF完全失败周期中,共有89个未受精卵,其中78个MⅡ期卵,显微注射78个,受精63个,卵裂51个,受精率为80.7%,卵裂率为80.9%,在10个新鲜移植周期(每周期的移植胚胎完全来源于补救ICSI后的受精卵)中共有2例临床妊娠;在2个冷冻移植周期(每周期的移植胚胎完全来源于补救ICSI后的受精卵)中有1例单胎妊娠,妊娠早期流产。胚胎来源于常规体外受精卵和补救ICSI后受精卵的移植周期临床妊娠率为18%;胚胎完全来源于补行ICSI后受精卵的移植周期临床妊娠率为20%。结论:ICSI可作为常规IVF失败后的有效补救措施。     

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。     

早期补救ICSI应用价值的初步探讨

目的:探讨早期补救ICSI的应用价值。方法:回顾性分析IVF受精失败、取卵后20h行补救ICSI者19例(晚补救ICSI,A组)及加精子(IVF)4~6h后未见第二极体(Pb2)的成熟卵行补救ICSI者31例(早补救ICSI,B组),并与544例同期常规ICSI(C组)进行比较,观察受精率、卵裂率、有效胚胎率、优质胚胎率、胚胎种植率、临床妊娠率,评价早补救ICSI有效性。结果:3组年龄及基础FSH均无统计学差异,B组正常受精率显著高于A组,但显著低于C组(71.27%vs55.69%vs81.08%,P<0.05),>2原核(PN)率A、B组间无统计学差异,但显著高于C组(7.73%vs7.78%vs2.73%,P<0.01),卵裂率B组显著高于A组(100%vs94.62%,P<0.05),有效胚胎率3组间无统计学差异,优质胚胎率B组显著高于A组,但低于C组(51.16%vs22.73%vs60.19%,P<0.01),胚胎种植率B组显著高于A组(1.75%vs17.54,P<0.05),与C组比较无统计学差异(17.54%vs18.90%,P>0.05),3组临床妊娠率分别为5.26%,26.67%和34.57%,与C组比,A组临床妊娠率显著下降(P<0.01)。结论:与晚补救ICSI相比,早补救ICSI获得了更高的受精率、卵裂率、优质胚胎率及种植率,但多PN率高于常规ICSI,优质胚胎率仍低于常规ICSI。     

异常受精胚胎临床利用价值探讨

目的:探讨常规体外受精(IVF)和卵胞浆内单精子注射(ICSI)周期中异常受精胚胎的临床利用价值。方法:回顾性分析2013年4月至2015年6月在白求恩国际和平医院生殖中心接受体外受精-胚胎移植(IVF-ET)治疗(包括常规IVF和ICSI)的955个周期的实验室和临床数据。结果:ICSI周期双原核(2 PN)受精率显著高于IVF周期2 PN受精率(88.20%vs 72.04%,P0.01),而ICSI周期的未见原核(0 PN)、单原核(1 PN)及多原核受精率均低于IVF周期(P0.01),差异有统计学意义。第5天(D5)0 PN的囊胚形成率和可利用囊胚率显著高于2 PN和1 PN组(P0.01)。新鲜移植周期和冻融卵裂胚移植周期,0 PN组种植率和临床妊娠率显著低于2 PN组(P0.01),但是冻融囊胚移植周期,0 PN组的种植率和临床妊娠率与2 PN组相比,差异均无统计学意义(P0.05)。结论:IVF/ICSI周期中没有2 PN胚胎可供选择移植时,可选择0 PN胚胎,囊胚培养是合理利用异常受精胚胎的有效手段。     

早期补救卵胞浆内单精子显微注射在完全受精失败周期的临床结局分析

目的:评估短时受精联合早期补救卵胞浆内单精子显微注射(R-ICSI)在完全受精失败周期的临床价值。方法:2009年1月～2010年6月我中心试管婴儿助孕治疗709例,其中短时受精完全失败行早期R-ICSI周期82例,卵胞浆内单精子显微注射(IC-SI)周期627例,比较两组正常受精率、异常受精率、优质胚胎率、胚胎种植率、临床妊娠率及流产率。结果:两组正常受精率、优质胚胎率、胚胎种植率、临床妊娠率及流产率无统计学差异,R-ICSI组异常受精率(5.0%)显著高于ICSI组(3.0%)(P<0.05)。结论:短时受精联合早期R-ICSI可及早发现受精失败并及时补救,获得较好的临床结局。     

短时受精联合早期补救ICSI技术的应用现状

将IVF中精卵共培养时间缩短至6h以内,观察第二极体是否排出可以准确地预测受精与否,不影响IVF结局,还可对受精失败的卵母细胞及早补救ICSI,获得良好的受精率、优质胚胎率和妊娠率,改善了受精失败患者的临床结局。     

体外培养24小时受精失败卵母细胞单精子显微注射再授精的观察

目的 探讨采用单精子显微注射（ＩＣＳＩ）技术处理体外培养２４ｈ后常规体外受精（ＩＶＦ）失败卵母细胞的效果。方法 对１９９７年６月至１９９８年１０月在我院生殖医学研究中心接受常规ＩＶＦ治疗的１７例非男性因素不育患者,采用常规超排卵方案治疗,经阴道Ｂ超介导取卵,共获卵１７９个,体外培养２４ｈ,所有卵母细胞在常规ＩＶＦ失败后,采用ＩＣＳＩ再授精。结果 共有１３０个卵母细胞常规ＩＶＦ失败后进行ＩＣＳＩ再授     

Late Fertilization of Unfertilized Human Oocytes in In Vitro Fertilization and Intracytoplasmic Sperm Injection Cycles: Conventional Insemination versus ICSI

Purpose: The aim of this study was to evaluate the efficacyof intracytoplasmic sperm injection (ICSI) in comparisonwith conventional reinsemination using fertilization failedoocytes by conventional in vitro fertilization (IVF). Methods: Oocytes were collected from patients of IVF orICSI cycles. Patients were grouped by fertilizationtechniques: group 1: conventional IVF; group 2: reinseminationafter conventional IVF failure; group 3: regular ICSI; group4: 1-day-old ICSI after conventional IVF failure; group 5:2-day-old ICSI after conventional IVF failure; group 6:re-ICSI after regular ICSI failure. Results: In different insemination groups, normalfertilization rate was higher (P < 0.001) in 1-day-old ICSI (47.1%)and 2-day-old ICSI groups (40.0%) than in reinsemination(14.7%). Abnormal fertilization rate was higher (P < 0.05)in re-ICSI group (21.7%) than any other groups (range:0–8%). Cleavage rate was higher in 1-day-old (36.7%)and 2-day-old ICSI groups (36.0%) than in reinsemination(5.3%, P < 0.001) or re-ICSI groups (17.4%, P < 0.05).Pregnancy rate was 27.6% and 20.0% in conventional IVFand regular ICSI groups, respectively. However, 1-day-oldICSI (group 4) and 2-day-old ICSI (group 5) were attemptedonce embryo transfer (ET) but failed pregnancy occurredin each group. Conclusions: In fertilization failure cycles, late ICSIincreases the rate of fertilization and embryonic developmentand may rescue the completely failed attempt of pregnancy.     

体外受精治疗不明原因不孕受精方法的探讨

目的:探讨不明原因不孕患者体外受精方式的选择。方法:将每例不明原因不孕患者(35例)超促排卵获取的卵母细胞随机分为二组,分别行常规体外受精(A组)和ICSI受精(B组),比较二组的受精结局、妊娠率及着床率。结果:A组受精率(51.2%)低于B组(61.3%,P<0.05);而完全受精失败率(20.0%)明显高于B组(2.8%,P<0.05);二组的优质胚胎率、临床妊娠率、着床率无差异。结论:不明原因不孕患者行首次IVF治疗时,采用部分卵母细胞常规受精、部分卵母细胞ICSI的方法,可降低完全受精失败风险。     

不明原因不孕患者体外受精方式的探讨

目的探讨不明原因不孕患者行首次体外受精(IVF)治疗时受精方式的选择。方法对2004年6月至2005年12月在北京大学第三医院行IVF治疗的35例不明原因不孕患者,将其卵母细胞分为2组,同时行常规受精和卵胞浆内单精子注射受精(ICSI),比较2组的受精结局、妊娠率及着床率。结果常规受精组受精率(51.2%)低于ICSI组(61.3%),差异有统计学意义(P<0.05);而完全受精失败率(20.0%)明显高于ICSI组(2.8%),差异有统计学意义(P<0.05);2组的优质胚胎率、临床妊娠率、着床率差异无统计学意义。结论不明原因不孕患者行首次IVF治疗时,采用部分卵母细胞常规受精、部分卵母细胞ICSI的方法,可降低完全受精失败风险。     

Short co-incubation of gametes combined with early rescue ICSI: An optimal strategy for complete fertilization failure after IVF

Abstract

Failed fertilization after conventional IVF is one of the most frustrating experiences in assisted reproductive technology. “Late” rescue ICSI may be not an optimal strategy for treating unfertilized oocytes. Short co-incubation of gametes combined with early rescue ICSI has some advantages for complete fertilization failure after IVF. We evaluate the strategy and the optimal time for early rescue ICSI. A total of 180 patients underwent short co-incubation of gametes combined with early rescue ICSI treatment for complete fertilization failure after IVF (study group). A total of 494 ICSI patients with male factor infertility served as a control group. Clinical pregnancy rate, implantation rate, and live birth rate in the two groups were compared. The study group was divided into three different rescue time intervals (＜6 h, 6–8 h, and ＞8 h). Clinical pregnancy rate, implantation rate, and live birth rate were comparable between the study group and the control group. There was a negative correlation between clinical outcomes and rescue time interval.     

未成熟卵母细胞体外培养在体外受精中对卵巢低反应性者的补救性应用

目的:探讨未成熟卵母细胞体外培养(IVM)在体外受精(IVF)中对卵巢低反应性者的补救性治疗效果。方法:30例行IVF时表现为卵巢低反应者(实验组)在B超引导下经阴道行卵泡穿刺术,取卵后对不同期未成熟卵母细胞行IVM,再行胞浆内单精子注射(ICSI)受精;对成熟卵母细胞则进行常规受精,胚胎形成后行移植术。取同期进行ICSI周期治疗的63例作为对照组。结果:应用IVM行IVF-ET补救治疗的30个周期中有29个周期获胚胎移植,临床妊娠9例(31%),胚胎种植率18.47%,但该组未成熟卵培养成熟后的受精率、卵裂率均低于对照组;总妊娠率及胚胎种植率比常规ICSI组低。结论:IVM技术联合IVF为卵巢低反应性者提供了一种有效的补救措施,明显减少了IVF周期的取消率,提高了妊娠机会。     

Reinsemination of oocytes by intracytoplasmic sperm injection after the failure of conventional fertilization. Early embryonal development

OBJECTIVE: To analyze the influence of intracytoplasmic sperm injection (ICSI) on early embryo development used for reinsemination of unfertilized 1-day-old oocytes. DESIGN: Prospective observational study. MATERIALS AND METHODS: A total of 126 embryos resulted from reinsemination by ICSI were analyzed with regard for the time course of cleavage and the quality of embryos at 48 hours after injection. Results were compared with those obtained in 698 embryos obtained after routine ICSI program. RESULTS: It has been shown that embryos derived from reinsemination developed slower in comparison with those obtained after regular ICSI program. At 48 hours after microinjection 50% of embryos achieved 4 blastomeres stage and 37% remained on 2 cells stage. 71% of regular ICSI embryos at this same time showed 4 blastomere or more, only 16% remained on 2 blastomeres stage. The quality of embryos was similar in two compared groups, however those obtained following reinsemination at 4 blastomere stage were significantly poorer quality. CONCLUSION: Embryos derived from reinsemination of 1-day old oocytes unfertilized after conventional IVF developed slower and the quality of embryos at 4 blastomere stage was poorer comparing to regular ICSI embryos.     

Rescue intracytoplasmic sperm injection (ICSI)-salvaging in vitro fertilization (IVF) cycles after total or near-total fertilization failure

Objective: To evaluate the effectiveness of delayed oocyte reinsemination by ICSI (rescue ICSI) after total or near-total fertilization failure (≤25%) in IVF.

Design: A retrospective clinical study.

Setting: Non–hospital-based IVF program.

Patient(s): Thirty IVF cycles with total fertilization failure and two cycles with ≤25% initial fertilization.

Main Outcome Measure(s): Fertilization and pregnancy rates after rescue ICSI.

Intervention(s): Rescue ICSI 19–22 hours after initial oocyte insemination.

Result(s): A fertilization rate of 60.2% was achieved with rescue ICSI (141 of 234 oocytes, 29 of 32 patients). Of 30 patients with total fertilization failure, 27 had fresh transfers with rescue ICSI embryos. Two additional patients with ≤25% initial fertilization had subsequent replacement of frozen-thawed rescue ICSI embryos. Six pregnancies resulted, including three singleton, one twin, one missed abortion, and one ectopic pregnancy (20.7%). One of the singleton pregnancies resulted from replacement of four frozen-thawed embryos and is the first known pregnancy achieved from cryopreserved rescue ICSI embryos.

Conclusion(s): Rescue ICSI should be considered in the presence of total or near-total fertilization failure in IVF. Early application of rescue ICSI (19–22 hours after insemination) may be critical for establishing fertilization within an optimal window and producing viable embryos and pregnancies.