Pig Reproductive and Respiratory Syndrome Virus (PRRSV) Does Not Attach to Boar Sperm;It Affects Only the Velocity Pattern and the Mobility Pattern

The purpose of the study was to evaluate the sperm viability of semen infected with PRRSV viral particles, observing the effect of the Virus on the motility of boar sperm. The work was carried out at the FMVZ-BUAP Genetics and Reproduction Laboratory. 5 stallions were used. Each sample contained 1 × 106 sperm, the PRRS virus strain was ATCC-VR-2332 (0, 102, 104 and 106 copies of RNA/mL in triplicate), it was observed daily at the CASA;Hamilton Thorne®. Cells with MT (P < 0.05) on days 1, 3, 5, 7 and 10 of evaluation with 201 ± 7.3, 167 ± 10.1, 165 ± 14.6, 134 ± 8.2 and 120 ± 8.8, respectively. The % MP between control and virus concentrations (P ≥ 0.05). The LCV on day 1 and 7 PI at 10X2 and 10X6 (P < 0.05) vs control. In the Correlation Matrix, where it is observed that there is a correlation between VSL and VAP, VSL and VCL, VCL and ALH, VAP with ALH. There is a correlation of VSL and ALH, STR and ALH. In this study there were (P ≤ 0.01) in the VCL, in the concentrations (102) 162.81 ± 10.65 and (106) 177.12 ± 5.77 vs 193.04 ± 4.62 of control. This indicates that altering these parameters would be related to fertility and the PRRS virus affects the LCV. Regarding the VSL, it was observed that the sperm infected with viruses 102, 104 and 106 of 48.00 ± 3.38, 49.88 ± 1.83 and 50.55 ± 2.24 Vs. 56.66 ± 1.68 of control respectively, the control would have greater possibilities of fertilizing the oocyte. In this study, it was found (P ≤ 0.01) in the VAP with 102 of 77.26 ± 5.16, 104 with 83.35 ± 2.41 and 106 with 81.29 ± 3.14 vs the control with 90.56 ± 2.07. Regarding the ALH there is (P < 0.05) a 104 with 8.70 ± .26 and 106 with 9.64 ± 0.23 vs control 8.50 ± 0.27. The presence of different concentrations of PRRSV in boar semen induces changes in different types of sperm motility. Infection of ejaculates with the PRRS virus affects sperm motility on days 1, 3, 5, 7, and 10 post-infections.

Low Level of Cystic Fibrosis Transmembrane Conductance Regulator Is Associated with Human Sperm Autophagy and Vitality

Low sperm motility is one of the main causes of male infertility. Cystic fibrosis transmembrane conductance regulator (CFTR, an anion channel protein) is related to the progressive motility of sperm. CFTR disruptor CFTRinh-172 or forskolin (FSK) in this study were used to treat human sperm separately, and the rates of sperm autophagy and progressive motility, mitochondrial membrane potential (MMP) and ATP concentration, and the expression levels of related factors were detected to explore their relationship. It was showed that sperms treated with CFTRinh-172 or FSK reduced the levels of cAMP, CFTR and PKA, but increased sperm autophagy rate, expression levels of AMPK and LC3B. However, reactive oxygen species content had no significant difference. It was indicated that low level of CFTR performed with cAMP and its downstream effectors such as PKA and AMPK to regulate mitochondrial structure and function, leading to increased autophagy rate and reduced vitality of sperm.

Can the Prediction of Intrauterine Insemination Results by Used Aniline Blue Stain (ABS) and Sperm Chromatin Dispersion (SCD) Levels?

Introduction: This study aimed to perform routine seminal fluid analysis, sperm DNA fragmentation, and sperm function tests at the chromatin maturation level and evaluate pregnancy in the patients passing intrauterine insemination before starting Intrauterine Insemination (IUI) method. Materials and Methods: In this prospective study, 111 couples who underwent Intrauterine Insemination (IUI) in unexplained infertility patients were admitted to Al-Farah IVF and assisted reproductive center in Baghdad, Iraq between November 2020 and February 2021 were evaluated. Semen fluid analysis was performed based on (WHO 4th) guiding rules. In addition, Sperm Chromatin Dispersion (halo test) and sperm maturation were performed with Aniline Blue Stain (ABS). Results: Sperm Chromatin Dispersion (SCD) groups were compared in terms of pregnancy outcome;the positive pregnancy rate was found to be above in the normal SCD groups (p = 0.0005). In addition, Aniline Blue Stain (ABS) groups were compared in the terms of pregnancy outcome;the positive pregnancy rate was found to be higher in the normal ABS group (p = 0.017). Conclusion: Our study showed that the use of DNA fragmentation (SCD) and sperm maturation tests (ABS) together with routine semen analysis in intrauterine insemination cases will make a significant contribution to the prediction of Intrauterine Insemination (IUI) increased results. So, these results indicate a defect in the effect of DNA fragmentation on the outcome of intrauterine insemination.

Laboratory and Clinical Outcomes of Single Sperm Cryopreservation in Patients Underwent Micro-TESE

For men with severe oligozoospermia, sperm cryopreservation can preserve surgically obtained sperm. How to cryopreserve single sperm in men is still a hot topic in assisted reproduction technology. Aim to analyze the laboratory and pregnancy outcomes of single sperm cryopreservation group, we retrospectively selected 38 cycles underwent single sperm cryopreservation and thawing as the study group and 618 cycles underwent conventional sperm cryopreservation and thawing as the control group, which were performed in the reproductive medicine center of the Sixth Affiliated Hospital, Sun Yatsen University, from April 2014 to October 2023. All the sperm came from microdissection testicular sperm extraction (micro-TESE), and performed intracytoplasmic sperm injection (ICSI) for fertilization. Zygotes were cultured to Day 3 embryo, which were freshly transferred to female uterus. Surplus embryos were cultured to blastosphere and cryopreserved. There was no statistical difference in female/male age, female BMI, infertility duration and female basal sex hormone (FSH, LH E2, AMH), No. of oocytes retrieved per cycle, No. of ICSI oocytes per cycle and No. of embryos transferred per cycle between the two groups (P > 0.05). No significant difference was found in two-pronuclear oocyte fertilization rate (59.23% VS 58.84%), Day 3 available embryo rate (61.81% VS 63.55%), Day 3 good-quality embryo rate (45.73% VS 50.27%), blastocyst formation rate (47.83% VS 49.46%), the implantation rate (47.37% VS 52.16%), clinical pregnancy rate (36.84% VS 47.18%), miscarriage rate (14.29% VS 12.68%) and live birth rate (85.71% VS 81.70%) between two groups (P > 0.05). In conclusion, single-sperm cryopreservation was the optimal method to preserve sperm after micro-TESE. It can increase the utilization of each sperm and lead to clinical pregnancy.

A Simple One-Step System Enhances the Availability of High-Quality Sperm for Assisted Reproductive Procedures

Over the last forty years, in vitro fertilization, which has expanded to assisted reproductive technologies (ART), has gone from an experimental procedure to the mainstay of infertility treatment. A technique that once made news with each birth is now responsible for 2% - 3% of the babies born in several nations of the world. This has happened due to significant advances in hormone therapies, culture techniques, and the specialization of equipment designed to support oocytes and embryos. However, for all the advances made to support female fertility, little has changed in male treatment since the advent of intracytoplasmic sperm injection in the early 1990’s. Recently, a number of authors have documented problems with sperm preparation techniques. Some report DNA damage, others membrane and organelle issues, all of which potentially hamper fertilization rates and possibly take-home baby rates. Further, as the clinical workload of ART has increased and staffing shortages have become critical, all labs are looking for simpler, more efficient ways to perform job functions. This study describes a simple, one-step method for preparing semen samples for ART. This new technique minimizes excessive manipulation of the sample compared to current standards and is less likely to cause cell damage. Preliminary results suggest a significant enhancement in recovered sample motility and an optimal sample for ART procedures with minimal sample manipulation.

Exposure to Automobile Pollutants and Sperm Quality among Mechanics in Brazzaville (Congo)

Atmospheric pollution is today at the heart of all debates because of its potentially harmful effects on the environment, the climate, and human health;it currently constitutes a real public health problem. However, the increase in infertility around the world has led scientists to look for a link between air pollution and fertility. This study consisted of evaluating the short-term influence of automobile pollution on the semen parameters of mechanics in Brazzaville. A cross-sectional, analytical, prospective study between two groups (G1, exposed people and G2, unexposed people) was carried out in Brazzaville on 228 patients, i.e., G1 with 76 subjects and G2 with 152 subjects, between June 2020 and September 2022, a period of 27 months, in order to evaluate, on the one hand, the quality of sperm in men exposed to automobile pollution according to WHO recommendations and, on the other hand, the quality of the air by a colorimetric method, punctual on a Dräger tube coupled with a Dräger Accuro pump. The concentrations of automotive pollutants measured (CO, CO2, NO2, SO2) during this study were all above the 2021 air quality standards required by WHO. These results made it possible to establish a statistically significant link between air pollution and abnormal spermogram parameters, notably mobility, count, and morphology for the spermocytogram. Exposures to automobile pollutants can influence sperm quality, which is consistent with the results of our study. We observed an alteration in the morphology, mobility, and concentration of spermatozoa.

精子线粒体膜电位作为综合评估男性生育能力指标的初探

目的本研究旨在探讨精子线粒体膜电位(MMP)与精液常规、精子形态学以及精子DNA碎片指数(DFI)之间的关联,以及MMP对于临床评估和预测男性生育能力的价值。方法选择2023年4—7月于江苏省中医院男科进行孕前优生检查、生育咨询以及不育症治疗的患者的精液标本为研究对象,按照世界卫生组织(WHO)第5版标准进行精液常规和精子形态学分析,并通过流式细胞术检测精子DFI和MMP。根据不同精液质量分为两组:精液质量各项指标均正常,即精液量>2 ml、pH值7.2~7.8、精子浓度≥15×106/ml,精子前向运动(PR)≥32%、精子形态正常率≥4%、DFI<30%为精液质量正常组(n=57);PR<32%、精子形态正常率<4%、DFI≥30%为精液质量异常组(n=67),比较两组精液质量各项参数;采用Spearman相关性分析,分析MMP与精子浓度、PR、精子形态正常率以及DFI之间的关系;绘制受试者工作特征曲线(ROC),分析MMP对于临床评估男性生育能力的价值。结果两组间平均年龄、精液量比较均无显著差异(P>0.05),精液质量正常组精子浓度、PR、精子形态正常率、MMP显著高于精液质量异常组(P<0.05),DFI显著低于精液质量异常组(P<0.05);Spearman相关性分析结果显示,MMP与精液量无明显相关性(r=-0.065,P=0.475),与精子浓度(r=0.396,P<0.001)、PR(r=0.471,P<0.001)、精子形态正常率(r=0.468,P<0.001)呈显著正相关,与DFI(r=-0.701,P<0.001)呈显著负相关;ROC分析结果显示,MMP对精液质量整体水平预测的ROC曲线下面积(AUC)为0.891,敏感度87.5%,特异性83.3%,截断值53.69%;MMP对精子浓度预测的AUC为0.787,敏感度82.0%,特异性69.2%,截断值43.97%;MMP对PR预测的AUC为0.741,敏感度65.7%,特异性84.2%,截断值56.33%;MMP对精子形态正常率预测的AUC为0.733,敏感度71.1%,特异性69.1%,截断值56.63%;MMP对DFI预测的AUC为0.809,敏感度89.5%,特异性72.1%,截断值54.78%。结论精子MMP与精子浓度、PR、精子形态正常率呈显著正相关,与DFI呈显著负相关。与各单项精液指标相比,MMP能更全面地反映精子能量代谢和凋亡,推荐将MMP 54%作为全面评估和预测男性生育能力的参考值下限。

时差成像胚胎培养系统观察精子DNA碎片化指数对卵胞浆内单精子显微注射的胚胎发育及临床结局的影响

目的使用时差成像(time-lapse imagining,TLI)胚胎培养系统观察精子DNA碎片化指数(DNA fragmentation index,DFI)对卵胞浆内单精子显微注射(intracytoplasmic sperm injection,ICSI)的胚胎发育指标及临床结局的影响。方法选取2023年1月至6月在上海交通大学医学院附属国际和平妇幼保健院辅助生殖科接受ICSI技术助孕的392对夫妇为研究对象,分为常规培养组284周期和TLI组108周期,再根据DFI≤15%、>15%~<30%、≥30%进一步分为正常组、临界组、异常组。比较各组的临床资料以及临床妊娠结局。统计学方法采用t检验、单因素方差分析、χ^(2)检验或Fisher确切概率法。结果6组的女方年龄、基础促卵泡激素(follicle stimulating hormone,FSH)、身体质量指数(body mass index,BMI)及获卵数比较,差异均无统计学意义(P值均>0.05);男方精液常规指标中,浓度和正常形态率比较,差异均无统计学意义(P值均>0.05);常规正常组、常规临界组、常规异常组、TLI正常组、TLI临界组和TLI异常组的前向运动精子率分别为(46.5±16.5)%、(31.0±14.2)%、(14.8±8.4)%、(41.6±16.2)%、(32.5±14.4)%、(19.3±11.1)%,常规异常组和TLI异常组的前向运动精子率分别低于常规正常组、常规临界组、TLI正常组和TLI临界组(P值均<0.05)。6组的卵裂率和囊胚形成率比较,差异无统计学意义(P>0.05)。常规正常组、常规临界组、常规异常组、TLI正常组、TIL临界组和TLI异常组的受精率分别为(77.3±18.6)%、(78.6±17.1)%、(68.3±22.7)%、(77.4±14.5)%、(74.5±13.1)%、(63.1±25.4)%;常规异常组的受精率低于常规正常组、常规临界组、TLI正常组(P值均<0.05);TLI异常组的受精率低于常规正常组、常规临界组、TLI正常组、TLI临界组(P值均<0.05)。常规正常组、常规临界组、常规异常组的妊娠率分别为57.4%(39/68)、54.5%(24/44)、27.3%(6/22),异常组低于正常组和临界组(P值均<0.05)。TLI正常组、TLI临界组和TLI异常组3组的妊娠率比较,差异无统计学意义(P>0.05)。常规组3组之间以及TLI 3组之间的早期流产率比较,差异无统计学意义(P>0.05)。结论精子DFI值的升高会影响精子前向运动率,还会影响胚胎的受精率,高DFI精子进行ICSI助孕时使用TLI胚胎培养系统可以获得稳定的妊娠率。

TLR7和TLR8在家畜性控技术中的研究进展

哺乳动物性别控制(sex control)技术在畜牧生产中有着重要的意义,在畜牧生产实践中,通过性别控制技术人类可以获得预想性别的优秀家畜后代,从而使家畜的泌乳性能、繁殖性能和生产性能发挥到最大。目前,传统的哺乳动物性别控制技术主要分为两类:受精前X/Y精子分离技术和受精后早期胚胎性别鉴定。这些方法都有各自的特点和局限性,如处理时间长、分离效率低、对精子活力和胚胎发育有损伤等,因此,这些技术有待进一步优化和完善。本文总结并分析了哺乳动物的传统性控技术,简述其各自特点及存在的问题。此外,利用激活Toll样受体7和Toll样受体8分离X/Y精子的新技术引起了广泛关注,与传统方法相比,该方法无需添加外源药物,具有高效、快速、无毒副作用等优点。尽管该技术已经成功应用于小鼠、羊、牛等动物的性别控制中,但在大规模应用上仍有一些问题需要进一步解决。本文总结了该技术的研究进展,分析了目前将该方法应用于实际生产中的可行性,并对该技术未来的发展趋势进行展望。

回族及维吾尔族圆头精子症患者的基因诊断、精子超微结构观察和辅助生殖结局分析

目的探讨2例少数民族(P1回族、P2维吾尔族)圆头精子症患者的临床表型、精子特点、遗传学病因以及辅助生殖结局。方法分析2例少数民族圆头精子症患者的临床资料和各种精液检查参数,观察精子超微结构,并利用全外显子检测技术和qPCR检测分析患者的遗传学病因,采用卵胞质内单精子注射联合卵母细胞激活技术(ICSI+AOA)进行辅助生殖治疗,并观察其助孕结局。结果2例患者均存在DPY19L2基因109681 bp纯合缺失,其中P2患者的DPY19L2基因缺失来源于近亲结婚的父母。P1患者精子活力低下,精子DNA碎片率高,精子形态为100%圆头精子,电镜下发现精子顶体缺失,同时存在质膜、线粒体和微管等超微结构缺陷;P2患者精子活力及精子DNA碎片率均正常,精子形态为100%圆头精子,电镜下观察发现精子主要缺陷为头部小而圆伴随顶体缺失,质膜、线粒体和微管等细胞器结构损伤与超微结构缺陷少见。2例患者夫妇均接受ICSI+AOA助孕,ICSI受精率P1患者夫妇为62.5%,P2患者夫妇为75%,均成功获得临床妊娠。结论DPY19L2基因异常在不同民族背景的圆头精子症患者中都是主要的致病遗传学原因。圆头精子可同时存在质膜、线粒体和微管等细胞器结构损伤与超微结构缺陷。ICSI+AOA是圆头精子症患者的有效辅助生殖治疗。

B超监测梅花鹿性控精液腹腔镜输精试验

梅花鹿常规冻精与性控冻精解冻后进行品质鉴定,结合B超监测卵泡有选择的对60只同期发情处理的梅花鹿进行腹腔镜精准输精。数据分析显示,同期发情处理后梅花鹿卵巢B超监测结果与腹腔镜输精受胎率存在明显的正相关;X和Y型冻精产仔率为83.33%,而常规冻精产仔率为65.31%,X、Y型冻精与常规冻精组间差异显著(P<0.05);常规冻精组、X冻精组与Y冻精组所产后代性别比(公/母)分别为9:8、0:10和16:1,X、Y型冻精与常规冻精组间差异显著(P<0.05),X、Y型冻精与常规冻精所产后代出生及60 d时的体重差异不显著(P <0.05)。结果表明,结合B超监测有选择的进行梅花鹿性控精液腹腔镜人工输精,可显著提高受胎率,降低成本,技术可行。

菟丝子盐炙前后对肾阳虚模型大鼠精子活力的影响

本文旨在研究菟丝子盐炙前后对肾阳虚大鼠精子活力的影响。本研究采用肌注氢化可的松的方法建立大鼠肾阳虚模型,分别用菟丝子生品、盐炙品、市售盐菟丝子的水提液以及金匮肾气丸对肾阳虚大鼠灌胃14 d,记录大鼠睾丸、附睾等脏器指数,精子密度及精子活力,观察睾丸组织病理切片,测定血清睾酮(T)水平及睾丸匀浆中酸性磷酸酯酶(ACP)、琥珀酸脱氢酶(SDH)、总超氧化物歧化酶(T-SOD)、谷胱甘肽(GSH)、丙二醛(MDA)水平。结果表明,与模型组比较,菟丝子盐炙品、市售品和生品水提液均可提高模型大鼠的精子活力,降低睾丸、附睾指数,改善生精小管稀少、各级生精细胞的病理症状,盐炙组睾酮、ACP、SDH、T-T-SOD、GSH平均值高于市售组和生品组,MDA低于市售组和生品组。菟丝子生品及盐炙品水提液可通过影响精子生成的酶以及抗氧化应激反应,改善氢化可的松致肾阳虚大鼠的精子活力,其中盐炙品效果更好。本研究初步探讨了盐菟丝子的炮制机理,为炮制的科学性提供了进一步的理论支撑。

长期摄入水解单宁对鼠类生殖的影响

水解单宁(hydrolyzed tannin)是橡子内主要的单宁酸类型,对以橡子为主要食物来源的鼠类的生存繁衍有重要影响.为探究长期取食水解单宁对鼠类的生殖激素与生殖器官产生的影响.选择72只(雌雄个体各36只)4周龄的健康昆明小鼠,随机分为4组,分别为对照组(水解单宁比例为0)、低单宁组(水解单宁比例为2%)、中单宁组(水解单宁比例为7%)和高单宁组(水解单宁比例为12%),用不同水解单宁含量的饲料饲喂42d后解剖取样.结果显示,高含量水解单宁显著降低了雄鼠存活率;中、高含量水解单宁对生殖激素的稳定产生负面效应;高含量水解单宁造成生殖器官损伤,导致小鼠卵巢与睾丸生理结构改变,降低了正常卵泡数量和精子的发生.试验验证了长期摄入高含量水解单宁打破了鼠类的生殖激素平衡且造成了生殖器官的损伤.

人类辅助生殖技术应用范围的法律调整论

人类辅助生殖技术在临床应用中改变了生育方式,提升了生育自主性和选择性,但也带来新的伦理和法律问题。不同国家的监管立场不同:美国倾向于放任,德国强调监管,而英国采取的平衡立场在平衡现代医学发展和伦理规范方面相对更优。针对现实纠纷,本文阐明法律上解决问题的共通性规则。第一,对于体外胚胎的处置权归属,在精卵提供者或其继承人与医疗机构的对抗中,法律应给予体外胚胎特殊利益保护;在精卵提供者的内部对抗中,不宜强行将拒绝生育者拉入亲子关系。第二,对于“死后”和“服刑中”群体的生育需求,需要求死者生前的明示同意,而基于比例原则维护良好监狱秩序和增强公众对刑罚体系的信心可对抗服刑人员的生育诉求。第三,由于第三方捐精、捐卵在家庭关系中引入外部遗传因素,需由夫妻共同同意,并由国家制定规则对供精供卵来源进行严格监管;“三亲婴儿”宜区别于基因编辑胎儿。第四,对于植入前遗传学诊断技术应用,应权衡优生和治疗的价值,限制非医学目的性别选择。

抗氧化剂在家禽精液储存中的应用研究进展

家禽精液储存对于种质资源的保护和维持家禽养殖业的可持续发展至关重要。家禽精子独特的结构特征,使得其在储存过程中特别容易受到氧化应激损伤,抗氧化系统失衡,导致精子活力和受精能力的下降。因此,为保证精子正常功能,可通过额外添加不同类型的抗氧化剂来降低损伤。本综述旨在介绍家禽精子结构特征及其抗氧化系统特点,并总结了抗氧化剂在家禽精液储存中的应用与效果,以期为家禽精液储存技术研究提供参考。

柞蚕精子质量与各虫态生命力关系研究

为探索柞蚕精子质量对虫体生命力的影响,以5个二化性品种柞蚕为试材,测定交配期精子质量,并在卵期、幼虫期、成虫期3个变态阶段,对柞蚕进行抗性鉴定。结果表明:柞蚕有核精子受精能力和无核精子活动能力在品种之间存在显著差异,有核精子受精能力与卵期耐高温胁迫能力呈显著正相关,与低龄幼虫对ApNPV的抗性呈显著正相关;无核精子活动能力与成虫耐高温胁迫能力呈显著正相关。说明柞蚕精子质量在一定程度上决定了卵期和幼虫期生命力,且成虫期生命力强的雄蛾产生的精子质量也相对较高。研究结果可为选育强健型柞蚕品种提供参考。

精子相关参数与体外受精受精率的相关性研究

目的探讨精子参数与体外受精(IVF)受精率的相关性。方法回顾性分析2020年4月至2023年4月在郴州市第一人民医院生殖医学中心进行IVF助孕的符合纳入、排除标准的327例病例。依据我中心胚胎实验室质控数据考核标准分为低受精组(受精率<30%,n=19)和正常受精组(受精率≥30%,n=308)。收集男方的基本信息与精子相关参数以及胚胎信息。用Pearson相关性分析各参数与精子受精率的相关性,Logistic回归分析精子受精率的影响因素,采用ROC曲线分析预测价值。结果精子顶体酶活性、正常形态精子百分率、精子DNA碎片指数(DFI)是影响受精率的相关因素,相关系数(r)分别为0.168、0.306、-0.243(P均<0.05)。Logistic回归分析确定三者均是影响IVF受精率的独立因素,并得出多因素回归方程式:受精率预估值=-2.561+0.035×精子顶体酶活性+2.066×正常形态精子百分率-1.51×精子DFI。精子顶体酶活性、正常形态精子百分率、精子DFI及三因素联合预测低受精率的ROC曲线下面积(AUC^(ROC))分别为0.806、0.889、0.827、0.899,其Yuden指数对应的cut-off值分别为61.2μIU/10^(6)精子、2.98%、27.50%、-21.32,敏感性分别为95.70%、76.90%、68.40%、64.30%,特异性分别为43.50%、94.70%、87.70%、100.00%,表明3个指标联合预测受精率的效能较好。结论精子顶体酶活性、正常形态精子百分率、精子DFI是预测IVF受精率的独立影响因素;可以用多因素回归方程式预测IVF的受精率。

大豆卵磷脂对绵羊精液低温保存效果的影响

为了研究大豆卵磷脂对绵羊精液低温保存效果的影响,在杜泊绵羊精液稀释液中分别添加0(对照)、1.875、3.750、7.500、15.000 g/L大豆卵磷脂,在4℃条件下进行低温保存,每隔12 h观察一次精子活率,统计精子有效存活时间和总存活时间,检测第48小时精子的畸形率和顶体完整率。结果表明,1.875 g/L组的精子有效存活时间、总存活时间显著高于对照组和其余各试验组(P<0.05);1.875 g/L组的精子顶体完整率显著高于15.000 g/L组(P<0.05),畸形率显著低于15.000 g/L组(P<0.05)。说明在稀释液中添加1.875 g/L的大豆卵磷脂可以延长精子的存活时间,提高绵羊精液低温保存的质量。

基于硅基过滤片的精子优选芯片设计与优化

利用半导体工艺技术构建了一种基于硅基过滤片的精子优选微流控芯片,具有高活力的精子会克服重力,在微孔的引导下游向精子收集池。分别在7,15,30,60 min对收集池中的精子取样,采用计算机辅助精子分析(CASA)系统进行精液常规检测、精子形态学和DNA碎片分析;对硅基过滤片的孔间距和筛选时间进行了优化。结果表明:6μm孔间距和15 min筛选时间为最佳的精子优选方案。所构建的基于硅基过滤片的精子优选芯片,可以有效优选出具有高活力且DNA完整性和形态正常率较高的精子。芯片精液吞吐量大,活动精子回收率较高,有一定的临床价值,同时提供了一种简单易操作的标准化精子优选流程。

单发肌壁间肌瘤患者IVF/ICSI生殖结局影响因素分析

目的:探究单发肌壁间肌瘤患者体外受精-胚胎移植/卵胞质内单精子显微注射(IVF-ET/ICSI)生殖结局的可能相关影响因素。方法:纳入2014年1月至2019年12月于山东大学附属生殖医院接受IVF/ICSI治疗的单发肌壁间肌瘤不孕症患者1348例,根据患者妊娠结局分为活产组(403例)与未活产组(945例)、妊娠组(634例)与未妊娠组(714例)。采用倾向性匹配评分(PSM)对活产组与未活产组患者进行1∶1条件匹配控制混杂因素,共386对患者匹配成功。两组间有统计学差异的协变量采用二元logistic回归分析。采用ROC曲线分析肌壁间肌瘤与生殖结局的关系,并评价其预测价值。通过计算约登指数找到截断值。结果:PSM匹配后,未获得活产组的宫腔操作史、子宫内膜压迫患者比例明显高于活产组,肌壁间肌瘤大小明显大于活产组,差异均有统计学意义(P<0.05);未妊娠组患者的子宫肌瘤直径显著大于妊娠组患者,差异均有统计学意义(P<0.05)。经二元logistic回归分析校正混杂因素后,宫腔操作史、子宫内膜受压及单发肌壁间肌瘤的直径对患者活产率存在显著影响(P<0.05);单发肌壁间肌瘤直径大小对患者妊娠存在显著影响(P=0.004)。通过ROC曲线分析得出单发肌壁间肌瘤直径在预测活产率方面的截断值为2.35cm。结论:在单发肌壁间肌瘤患者中,成功活产与未活产患者相比,在宫腔操作史、子宫内膜受压以及子宫肌瘤直径方面存在显著差异,且三者均为导致活产率下降的独立影响因素,当肌瘤直径≥2.35cm对活产率的影响更为显著。