Assisted reproductive technology

辅助生殖技术
  • 文章类型: Journal Article
    本文研究了选择的框架,新加坡关于选修卵子冷冻的辩论中的风险和倾向,从2012年政府对禁令的审查开始,到2023年程序合法化时结束。它证明了将关于生殖选择的自由话语与关于卵子冷冻的技术批评话语调和为一种危险且压迫性的发音技术的可能性。虽然医疗并发症,虚假的希望和商业滥用是新加坡长期以来的担忧,通过年龄限制,这些风险被认为与选择相协调,来自国家和国际监管背景的强制性咨询和比较框架。此外,低生育率和促进性别平等的努力使选择和平等成为政策理由,而女性候选人的“异性恋生殖欲望”的建构以女性为中心的方式构成了发音主义。新加坡强大的干预主义文化促进了这种和解,这种文化使家长制和专一主义正常化。在这种情况下,通过参与者表达政策理念,选择性卵子冷冻被重新解释为一种风险可控的技术,以及对妇女和国家的希望技术。因此,政治家共同创造了一个道德的新加坡国家,该国家允许选择性冷冻卵子,同时支持妇女和社会的利益,记者和医生。
    This article examines the framing of choice, risk and pronatalism in Singapore\'s debate on elective egg freezing, beginning from the government\'s review of the ban in 2012 and ending in 2023 when the procedure was legalised. It demonstrates the possibility of reconciling liberal discourses on reproductive choice with technocritical discourses on egg freezing as a risky and oppressive pronatalist technology. While medical complications, false hope and commercial abuse were longstanding concerns in Singapore, these risks were perceived as reconcilable with choice through an age limit, mandatory counselling and comparative frames from the national and international regulatory context. Additionally, low fertility rates and efforts to advance gender equality enabled the reconciliation of choice and pronatalism as policy justifications, while the construction of female candidates\' heteronormative reproductive desire framed pronatalism in women-centric ways. Such reconciliation was facilitated by Singapore\'s strong interventionist culture which normalises paternalism and pronatalism. Within this context and through actors\' articulation of policy ideas, elective egg freezing was reinterpreted as a technology with manageable risks, and a hope technology for women and nation. A moral Singapore State which permits elective egg freezing while supporting the interests of women and society was thus co-produced by politicians, journalists and doctors.
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  • 文章类型: Journal Article
    2023年,美国泌尿外科协会(AUA)要求进行更新文献综述(ULR),以纳入自本指南2020年发布以来产生的新证据。由此产生的2024年准则修正案提出了更新的建议,为不育夫妇中男性伴侣的适当评估和管理提供指导。
    在2023年,《男性不孕症指南》通过AUA修订过程进行了更新,其中对新发表的文献进行了审查,并将其整合到先前发表的指南中。更新的文献检索确定了4093份新摘要。经过最初的抽象筛选,125份符合条件的研究摘要符合纳入标准。在数据提取方面,22项感兴趣的研究被纳入最终证据基础,以告知准则修正案。
    专家小组在最新审查的基础上制定了基于证据和共识的声明,为男性不育症的评估和管理提供指导。这些更新在这里详细介绍。
    此更新提供了一些新见解,包括修改后的Y染色体微缺失检测阈值,不育症男性盆腔MRI成像的适应症,以及关于非无精子症男性睾丸精子使用的指导。随着该领域的诊断和治疗方案的不断发展,该指南将需要进一步审查。
    UNASSIGNED: In 2023 the American Urological Association (AUA) requested an Update Literature Review (ULR) to incorporate new evidence generated since the 2020 publication of this Guideline. The resulting 2024 Guideline Amendment addresses updated recommendations to provide guidance on the appropriate evaluation and management of the male partner in an infertile couple.
    UNASSIGNED: In 2023, the Male Infertility Guideline was updated through the AUA amendment process in which newly published literature is reviewed and integrated into previously published guidelines. An updated literature search identified 4093 new abstracts. Following initial abstract screening, 125 eligible study abstracts met inclusion criteria. On data extraction, 22 studies of interest were included in the final evidence base to inform the Guideline amendment.
    UNASSIGNED: The Panel developed evidence- and consensus-based statements based on an updated review to provide guidance on evaluation and management of male infertility. These updates are detailed herein.
    UNASSIGNED: This update provides several new insights, including revised thresholds for Y-chromosome microdeletion testing, indications for pelvic MRI imaging in infertile males, and guidance regarding the use of testicular sperm in nonazoospermic males. This Guideline will require further review as the diagnostic and treatment options in this space continue to evolve.
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  • 文章类型: Journal Article
    目标:全球获得辅助生殖技术(ART)的机会仍然非常不公平。直到最近,爱尔兰的ART只能通过私人生育诊所获得。公共资助的ART于2023年9月推出,但资格要求患者满足严格的准入标准,包括由其初级保健全科医生(GP)转介到当地生育服务。以前的研究报告说,医生的生育培训,包括GP,是可变的,对于爱尔兰的全科医生学员来说,妇产科(O&G)轮换不是强制性的。本研究旨在调查全科医生对生育调查和管理的了解,以及对公共资助的ART准入标准的态度。
    方法:对2023年9月至2024年1月在爱尔兰工作的全科医生进行了一次横断面在线调查。调查问卷探讨了人们对以下方面的态度,和知识,ART包括公共资助的准入标准。使用内容分析对自由文本问题的回答进行了定性分析。
    结果:该研究有154名受访者,约占爱尔兰全科医生的4%。四分之三(n=120,78%)的受访者是女性,68%(n=105)完成了O&G培训轮换,而72%(n=111)具有进一步的O&G资格。然而,69%(n=107)报告说他们没有接受过不育调查和管理方面的培训,34%(n=53)在完成调查前不了解公共资助ART的准入标准.几乎所有全科医生(97%,n=149)认为他们将从更多的生育教育中受益。定性内容分析产生了关于公共资助的ART的两个主题:(i)访问标准过于严格,(ii)全科医生的工作量将增加。
    结论:爱尔兰的全科医生现在的任务是管理不孕症和生育治疗转诊,但是大多数人没有得到足够的培训。我们的研究表明,爱尔兰的全科医生希望为公共资助的ART提供更广泛的准入标准,并为自己的临床实践提供更好的生育培训和教育。
    OBJECTIVE: Global access to assisted reproductive technologies (ART) remains highly inequitable. Until recently, access to ART in Ireland was solely available through private fertility clinics. Publicly funded ART was introduced in September 2023 but eligibility requires patients to meet strict access criteria that include referral by their primary care general practitioner (GP) to the local fertility service. Previous studies report that fertility training amongst doctors, including GPs, is variable and an obstetrics and gynaecology (O&G) rotation is not mandatory for GP trainees in Ireland. This study aimed to investigate GPs\' knowledge of fertility investigations and management, as well as attitudes towards publicly funded ART access criteria.
    METHODS: A cross-sectional online survey was distributed to GPs working in Ireland between September 2023 and January 2024. The survey questionnaire explored attitudes to, and knowledge of, ART including the publicly funded access criteria. Responses to free-text questions were qualitatively analysed using content analysis.
    RESULTS: The study had 154 respondents, representing approximately 4 % of GPs in Ireland. Three quarters (n = 120, 78 %) of respondents were female, 68 % (n = 105) had completed an O&G training rotation and 72 % (n = 111) had further O&G qualifications. However, 69 % (n = 107) reported that they had no training in subfertility investigation and management, and 34 % (n = 53) were not aware of the access criteria for publicly funded ART prior to completing the survey. Almost all GPs (97 %, n = 149) felt that they would benefit from more education on fertility. Qualitative content analysis generated two themes regarding publicly funded ART: (i) the access criteria are too restrictive and (ii) the workload for GPs will increase.
    CONCLUSIONS: GPs in Ireland are now being tasked with managing infertility and fertility treatment referrals, but most have not been provided with sufficient training. Our study shows that GPs in Ireland desire broader access criteria for publicly funded ART and better fertility training and education for their own clinical practice.
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  • 文章类型: Journal Article
    指出几个国家的父母年龄在增加是没有争议的。但是如何应对这种增长可能是。一些北欧国家在其国家立法中对寻求辅助生殖的女性设定了年龄上限,但没有人对男性这样做。在一些北欧国家,也有一些建议限制高龄女性和男性获得公共资助的辅助生殖。正如最近的数据现在显示的躯体和精神健康风险与老年人的年龄有关,我们问,是否现在是各国为寻求辅助生殖的男性设定年龄上限的时候了,就像已经为女性设定的年龄上限一样,并总结了在生育诊所治疗高龄夫妇所涉及的一些风险和回报。
    It is not controversial to state that parental age is increasing in several countries. But how to deal with this increase might be. Some Nordic countries have set an upper age limit for females seeking assisted reproduction in their national legislation, but none have done so for males. There are also recommendations in place that restrict access to publicly funded assisted reproduction for both females and males of advanced age in some Nordic countries. As recent data now show somatic and psychiatric health risks related to advanced paternal age, we ask if the time has come for countries to set an upper age limit for males seeking assisted reproduction like there already is for females, and summarize some of the risks and rewards involved in treating couples with advanced age in fertility clinics.
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  • 文章类型: Journal Article
    目的:精子DNA片段的增加对精液质量和生育能力有潜在的影响。常用的精子染色质分散测试提供了间接估计,但在偏倚和变异性方面存在局限性。这项研究旨在评估精子染色质分散测定预测辅助生殖技术结果的可靠性。
    方法:本系统评价包括2023年12月之前发表的符合系统评价和荟萃分析指南首选报告项目的研究。PubMed/MEDLINE,Scopus,搜索了谷歌学者数据库。使用精子染色质分散测定,并包括卵胞浆内单精子注射与体外受精的亚分析,比较了高(≥30%)和低(<30%)精子DNA片段化患者的各种辅助生殖技术结果。全面的荟萃分析软件有助于定量分析,并在病例和对照之间进行统计学比较。评估研究间异质性,并进行了敏感性和发表偏倚检验.
    结果:在评估的199篇摘要中,筛选了64篇全文,定性合成了44篇文章。对代表5346名参与者的14篇文章进行了定量分析。使用精子染色质分散测定,精子DNA片段升高与受精和胚胎卵裂率降低有关.值得注意的是,高精子DNA碎片水平不影响临床妊娠,植入,流产,或活产结果。亚分析显示施肥较低,胚胎卵裂,临床妊娠,活产率,仅在胞浆内单精子注射亚组的流产率较高。
    结论:精子染色质分散度测定在高精子DNA片段组和低精子DNA片段组之间的妊娠或活产率没有显着差异。值得注意的是,在卵胞浆内单精子注射组中,精子DNA碎片高与辅助生殖技术结局差相关.鉴于目前证据的质量,受实验设计和女性不孕因素校正的影响,临床医生应警惕该试验对妊娠和活产结局的预测能力有限.
    OBJECTIVE: Elevated sperm DNA fragmentation has potential implications for semen quality and fertility. The commonly used sperm chromatin dispersion test offers an indirect estimation but has limitations in terms of bias and variability. This study aimed to assess the reliability of the sperm chromatin dispersion assay for predicting assisted reproductive technology outcomes.
    METHODS: This systematic review included studies published until December 2023 that adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. PubMed/MEDLINE, Scopus, and Google Scholar databases were searched. Various assisted reproductive technology outcomes in patients with high (≥ 30%) versus low (< 30%) sperm DNA fragmentation were compared using a sperm chromatin dispersion assay and including a sub-analysis of intracytoplasmic sperm injection versus in vitro fertilization. A comprehensive meta-analysis software facilitated quantitative analysis with statistical comparisons between cases and controls. Interstudy heterogeneity was assessed, and sensitivity and publication bias tests were performed.
    RESULTS: Of the 199 abstracts assessed, 64 full-text articles were screened, and 44 articles were qualitatively synthesized. Fourteen articles representing 5346 participants were quantitatively analyzed. Using the sperm chromatin dispersion assay, elevated sperm DNA fragmentation was associated with lower fertilization and embryo cleavage rates. Notably, high sperm DNA fragmentation levels did not affect the clinical pregnancy, implantation, miscarriage, or live birth outcomes. Sub-analysis revealed lower fertilization, embryo cleavage, clinical pregnancy, live birth rates, and higher miscarriage rates in the intracytoplasmic sperm injection subgroup only.
    CONCLUSIONS: The sperm chromatin dispersion assay did not show significant differences in pregnancy or live birth rates between the high- and low-sperm DNA fragmentation groups. Noteworthy, high sperm DNA fragmentation was associated with worse assisted reproductive technology outcomes in the intracytoplasmic sperm injection group. Given the current quality of the evidence, affected by the experimental design and the absence of correction for female factors of infertility, clinicians should be wary of the assay\'s limited predictive power for pregnancy and live birth outcomes.
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  • 文章类型: Journal Article
    目的:探讨日本国内慢性子宫内膜炎(CE)诊断和治疗的变化。
    方法:我们在2021年至2022年间针对日本所有辅助生殖技术(ART)设施进行了全国性调查。诊断方法,标准,并通过问卷调查收集了CE的一线和二线治疗方案。
    结果:在616个ART设施中,437人回答调查(应答率:70.9%),其中339人(77.6%)实施CE诊断和治疗。在CE的诊断中,214(63.1%)设施使用CD138子宫内膜组织免疫组织化学染色,而宫腔镜检查是最常用的辅助诊断方法(241个设施,71.1%)。CD138阳性细胞诊断CE的最常见截止值为3-5个细胞/20个高功率场(50%),但7.9%(17个设施)和5.1%(11个设施)使用1个和2个细胞的截止值,分别。最常见的一线和二线治疗方法是多西环素(210个设施,61.9%)和环丙沙星+甲硝唑(164个设施,48.0%),分别。
    结论:用于诊断CE的CD138阳性细胞的数量存在相当大的差异。建立统一的CE诊断标准和治疗方法对于在国家层面为CE提供标准化药物至关重要。
    OBJECTIVE: To investigate variation in the diagnosis and treatment of chronic endometritis (CE) at the national level in Japan.
    METHODS: We performed a nationwide survey targeting all assisted reproductive technology (ART) facilities across Japan between 2021 and 2022. Diagnostic methods, criteria, and first- and second-line treatment protocols for CE were collected via a questionnaire.
    RESULTS: Among 616 ART facilities, 437 responded to the survey (response rate: 70.9%) of which 339 (77.6%) implemented diagnosis and treatment of CE. In the diagnosis of CE, 214 (63.1%) facilities used CD138 immunohistochemical staining of endometrial tissue, while hysteroscopy was the most frequently used as an adjunct diagnostic method (241 facilities, 71.1%). The most frequent cutoff value of CD138-positive cells for diagnosing CE was 3-5 cells/20 high-power fields (50%), but 7.9% (17 facilities) and 5.1% (11 facilities) used cutoff values of 1 and 2 cells, respectively. The most common first- and second-line treatment methods were doxycycline (210 facilities, 61.9%) and ciprofloxacin + metronidazole (164 facilities, 48.0%), respectively.
    CONCLUSIONS: There is considerable variation in the number of CD138-positive cells used for diagnosing CE. Establishing unified diagnostic criteria and therapeutic methods for CE is essential to provide standardized medicine for CE at the national level.
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  • 文章类型: Journal Article
    背景:氧化应激(OS)在女性生殖和生育能力中起着有害的作用。一些研究探索了各种饮食干预和抗氧化剂补充剂,如虾青素(AST),减轻OS对女性生育能力的不利影响。在一些动物和临床研究中已经显示了AST对女性生育力和生殖器官氧化还原状态的改善作用。
    目的:目前对动物和临床研究的系统评价和荟萃分析的主要目的是全面概述目前关于AST对女性生育力和生殖结局的影响的证据。AST对氧化还原状态的影响,生殖器官炎症和凋亡标志物作为次要结局.
    方法:我们系统地搜索了电子数据库,包括PubMed,Scopus,和WebofScience,直到2024年1月1日,使用与AST相关的指定搜索词,女性生殖性能,和不孕症,考虑到在人类或动物模型中比较口服AST补充剂与安慰剂或对照的介入研究的文献中发现的不同同义词。
    方法:两名独立的评审员提取了有关研究特征的数据,结果,和偏见的风险。我们使用随机效应模型汇总了结果,并评估了异质性和证据质量。我们描述性地报告了动物模型的数据,因为meta分析是不可能的.
    方法:临床试验的荟萃分析表明,AST可显著提高卵泡液中卵母细胞成熟率(MD:8.40,95%CI:4.57~12.23,I2:0%)和总抗氧化能力水平(MD:0.04,95%CI:0.02~0.06,I2:0%)。其他ART和妊娠结局和氧化还原状态标志物没有显示出统计学上的显着变化。动物研究报道了AST对氧化还原状态的改善作用,炎症,凋亡,和卵巢组织形态学。
    结论:本系统综述显示,补充AST可以通过提高卵母细胞质量和降低生殖器官OS来改善辅助生殖技术的结果。然而,证据受到异质性的限制,偏见的风险,纳入研究的样本量较小。
    BACKGROUND: Oxidative stress (OS) plays a harmful role in female reproduction and fertility. Several studies explored various dietary interventions and antioxidant supplements, such as astaxanthin (AST), to mitigate the adverse effects of OS on female fertility. Ameliorative effects of AST on female fertility and the redox status of reproductive organs have been shown in several animal and clinical studies.
    OBJECTIVE: The main objective of present systematic review and meta-analysis of both animal and clinical studies was to provide a comprehensive overview of the current evidence on the effects of AST on female fertility and reproductive outcomes. The effect of AST on redox status, inflammatory and apoptotic markers in reproductive organs were included as the secondary outcomes.
    METHODS: We systematically searched electronic databases including PubMed, Scopus, and Web of Science, until January 1, 2024, using specified search terms related to AST, female reproductive performance, and infertility, considering the diverse synonyms found in the literature for interventional studies that compared oral AST supplementation with placebo or control in human or animal models.
    METHODS: Two independent reviewers extracted data on study characteristics, outcomes, and risk of bias. We pooled the results using random-effects models and assessed the heterogeneity and quality of evidence. We descriptively reported the data from animal models, as meta-analysis was not possible.
    METHODS: The meta-analysis of clinical trials showed that AST significantly increased the oocyte maturation rate (MD: 8.40, 95% CI: 4.57 to 12.23, I2: 0%) and the total antioxidant capacity levels in the follicular fluid (MD: 0.04, 95% CI: 0.02 to 0.06, I2: 0%). The other ART and pregnancy outcomes and redox status markers did not show statistically significant changes. The animal studies reported ameliorative effects of AST on redox status, inflammation, apoptosis, and ovarian tissue histomorphology.
    CONCLUSIONS: This systematic review shows that AST supplementation may improve assisted reproductive technology outcomes by enhancing oocyte quality and reducing OS in the reproductive organs. However, the evidence is limited by the heterogeneity, risk of bias, and small sample size of the included studies.
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  • 文章类型: Journal Article
    目的:研究辅助生殖技术(ART)在妇科癌症患者中的生殖结局,并评估母婴并发症。
    方法:本研究包括2013年至2021年在上海集爱遗传和IVF研究所接受首次体外受精/卵胞浆内单精子注射(IVF/ICSI)治疗的被诊断为妇科癌症的女性。无任何癌症史的不孕妇女与癌症组相匹配。主要结果是累积活产率。使用正态分布变量的Student\'st检验和分类变量的卡方检验比较各组之间的基线和随访数据。采用基于倾向评分的患者匹配方法,以确保有和没有特定癌症类型的个体之间的可比性。
    结果:本研究共纳入了136例有妇科癌症史的患者和241例健康不孕对照。子宫内膜癌占病例的50.70%,宫颈癌占病例的34.60%。癌症组表现出明显更短的刺激持续时间,较低水平的雌二醇,回收的卵母细胞数量较少,第3天的胚胎,囊胚与对照组比较(P<0.05)。妇科癌症组的累积活产率明显低于对照组(36.10%vs.60.50%,P<0.001)。母婴并发症组间差异无统计学意义(P>0.05)。子宫内膜癌和宫颈癌组的累积活产率显着低于其匹配的对照组(38.60%vs.64.50%,P=0.011和24.20%vs.68.60%,分别为P<0.001)。
    结论:这些发现强调了接受ART的女性妇科癌症患者的妊娠和活产发生率下降,特别是子宫内膜癌和宫颈癌。这些发现对于接受ART的妇科癌症患者的咨询和管理具有重要意义。
    OBJECTIVE: To examine the reproductive outcomes of assisted reproductive technology (ART) in gynecologic cancer patients and to assess maternal and neonatal complications.
    METHODS: Women diagnosed with gynecologic cancer who underwent their first in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) treatment between 2013 and 2021 at Shanghai Ji Ai Genetics and IVF Institute were included in this study. Infertile women without any history of cancer were matched to the cancer group. The primary outcome was the cumulative live birth rate. Baseline and follow-up data were compared between groups using Student\'s t-tests for normally distributed variables and with Chi-square test for categorical variables. A propensity score-based patient-matching approach was adopted to ensure comparability between individuals with and without specific cancer type.
    RESULTS: A total of 136 patients with a history of gynecologic cancer and 241 healthy infertile controls were included in this study. Endometrial cancer constituted 50.70% of the cases and cervical cancer constituted 34.60% of the cases. The cancer group exhibited significantly shorter duration of stimulation, lower levels of estradiol, lower number of retrieved oocytes, day-3 embryos, and blastocysts compared to the control group (P < 0.05). The cumulative live birth rate of the gynecologic cancer group was significantly lower than that of the control group (36.10% vs. 60.50%, P < 0.001). Maternal and neonatal complications did not significantly differ between the groups (P > 0.05). The endometrial cancer and cervical cancer groups showed significantly lower cumulative live birth rates than their matched controls (38.60% vs. 64.50%, P = 0.011 and 24.20% vs. 68.60%, P < 0.001, respectively).
    CONCLUSIONS: These findings highlight the decreased occurrence of pregnancy and live birth in female gynecologic cancer patients undergoing ART, particularly in endometrial cancers and cervical cancers. These findings have important implications for counseling and managing gynecologic cancer patients undergoing ART.
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  • 文章类型: Case Reports
    不孕症影响着全球数百万人,父母高龄构成重大风险。此病例报告详细介绍了一对夫妇经历了12年的继发性不孕症。在辅助生殖技术(ART)的多次尝试失败后,包括富血小板血浆(PRP)灌注和激光辅助孵化(LAH)的个性化治疗方案成功妊娠.诊断评估确定了特定的生殖挑战,导致量身定制的干预措施。在PRP治疗增加子宫内膜厚度和LAH促进胚胎着床后,获得了积极的妊娠结局。该病例强调了个体化治疗策略在不孕症管理中的重要性,并证明了PRP和LAH在克服复发性植入失败中的潜在功效。需要进一步的研究来解释PRP和LAH在改善妊娠结局中的作用。尤其是年龄较大的父母和有体外受精(IVF)治疗失败史的夫妇。
    Infertility affects millions globally, with advanced parental age posing a significant risk. This case report details a couple who experienced secondary infertility for 12 years. Following multiple unsuccessful attempts at assisted reproductive technology (ART), a personalized treatment regimen involving platelet-rich plasma (PRP) perfusion and laser-assisted hatching (LAH) resulted in a successful pregnancy. Diagnostic evaluations identified specific reproductive challenges, leading to tailored interventions. A positive pregnancy outcome was achieved after PRP treatment enhanced endometrial thickness and LAH facilitated embryo implantation. This case highlights the importance of individualized treatment strategies in infertility management and proves the potential efficacy of PRP and LAH in overcoming recurrent implantation failure. Further research is needed to explain the roles of PRP and LAH in improving pregnancy outcomes, especially in older parents and couples with a history of failed in vitro fertilization (IVF) treatments.
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  • 文章类型: Journal Article

    微流体装置经过高度优化,可以从围绕它们的卵丘-电晕细胞团中去除卵母细胞。此外,它有效地捕获和固定卵母细胞,帮助评估它们的质量并促进精子注射到卵母细胞中。在这项研究中,使用传统的软光刻方法设计和制造了一种新型的微流控芯片。
    这项研究提出了利用微流控芯片代替涉及卵母细胞剥脱的常规手动程序,诱捕,和固定。使用COMSOLMultiphysics®5.2软件对微流控芯片进行建模和仿真,以优化和增强其设计和性能。微流控芯片是通过采用软光刻方法在聚二甲基硅氧烷基底上使用常规注射成型技术制造的。
    施加静水压力以引导卵母细胞通过预定途径,以消除卵母细胞周围的卵丘细胞。随后通过利用沿路径的液压阻力将卵母细胞限制在指定的捕获区域内,并通过施加真空力将其固定。
    与酶和机械技术相比,该芯片的应用需要较低水平的操作员专业知识。此外,在整个过程中持续监测卵母细胞的状态是可行的。与更标准的方法相比,对文化媒体的需求减少了。

    UNASSIGNED: The microfluidic device is highly optimized to remove oocytes from the cumulus-corona cell mass surrounding them. Additionally, it effectively captures and immobilizes the oocytes, aiding in assessing their quality and facilitating the injection of sperm into the oocyte. In this study, a novel microfluidic chip was designed and manufactured using conventional soft lithography methods.
    UNASSIGNED: This research proposes the utilization of a microfluidic chip as a substitute for the conventional manual procedures involved in oocyte denudation, trapping, and immobilization. The microfluidic chip was modeled and simulated using COMSOL Multiphysics® 5.2 software to optimize and enhance its design and performance. The microfluidic chip was fabricated using conventional injection molding techniques on a polydimethylsiloxane substrate by employing soft lithography methods.
    UNASSIGNED: A hydrostatic force was applied to guide the oocyte through predetermined pathways to eliminate the cumulus cells surrounding the oocyte. The oocyte was subsequently confined within the designated trap region by utilizing hydraulic resistance along the paths and immobilized by applying vacuum force.
    UNASSIGNED: The application of this chip necessitates a lower level of operator expertise compared to enzymatic and mechanical techniques. Moreover, it is feasible to continuously monitor the oocyte\'s state throughout the procedure. There is a reduced need for cultural media compared to more standard approaches.
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