نتایج جستجو برای: روش icsi

تعداد نتایج: 374052  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1391

ساخت حیوانات تراریخته با استفاده از اسپرم به عنوان حامل dna خارجی (smgt) یکی از روش های شناخته شده در بحث حیوانات تراریخته محسوب می شود. امروزه از تزریق درون سیتوپلاسمی اسپرم (icsi) در این روش، استفاده های قابل توجهی به عمل می آید. با توجه به سادگی و راندمان بالا در ساخت حیوانات تراریخته در روش smgt الحاق تصادفی ژن در این روش یکی از ایرادهای اساسی مرتبط با این تکنیک محسوب می شود. در این مطالعه ...

سلسبیلی, ناصر, محمودی, محمود, مظفریان, فرشته, موثقی, شبنم, نادیا شریفی, زهرا,

  سابقه و هدف: یکی از عوامل مهم ناباروری مردان، ضایعات نخاعی است که با توجه به سابقه جنگ تحمیلی درصد بالایی از جمعیت مردان نابارور را در کشور ما تشکیل می دهد. براساس مطالعات انجام شده، مهمترین مشکل این بیماری ناتوانی در انزال و کیفیت پایین مایع منی است. هدف این تحقیق تعیین رابطه کیفیت مایع منی مردان مبتلا به ضایعات نخاعی بر روی میزان ناباروری به روش ( Intra cytoplasmic sperm injection: ICSI ) و...

Journal: :Turkish journal of medical sciences 2017
Mohammad Ali Khalili Iman Halvaei Shahin Ghazali Mohammad Hossein Razi

BACKGROUND/AIM Many technical factors can affect intracytoplasmic sperm injection (ICSI) outcomes. The role of the injection micropipette could be of vital importance in ICSI programs. The main goal was to compare ICSI pregnancy outcomes between commercial and home-made injection micropipettes in a large population with male factor infertility. MATERIALS AND METHODS Five-hundred and eleven IC...

Journal: :Human reproduction 2001
K Yanagida H Katayose S Hirata H Yazawa S Hayashi A Sato

Sperm immobilization prior to intracytoplasmic sperm injection (ICSI) is thought to be necessary for efficient fertilization. A variety of methods of sperm immobilization (pipetting, squeezing and piezo application) are currently employed in ICSI. The effect of differences in immobilization method on the timing of initial Ca(2+) oscillations of oocytes in ICSI was investigated. Motile spermatoz...

Journal: :International braz j urol : official journal of the Brazilian Society of Urology 2007
Sandro C Esteves Danielle T Schneider Sidney Verza

OBJECTIVE The aim of this study was to analyze the influence of autoantibodies against spermatozoa present in the semen on the outcome of in vitro fertilization with intracytoplasmic sperm injection (ICSI). MATERIALS AND METHODS We performed a retrospective analysis of clinical and laboratorial data from a six year-period ICSI cycles. Screening for the presence of ASA in the semen, by using t...

Journal: :Human reproduction 2008
Antoine A Abu-Musa Anwar H Nassar Ihab M Usta

BACKGROUND Factors influencing a pregnant woman's decision to accept prenatal testing are largely undefined. Our study aimed to compare the acceptance rate of prenatal diagnosis in women who conceived through IVF or ICSI (cases) with that of women who conceived spontaneously (controls). METHODS Retrospective chart review in Lebanon of all primiparas carrying singletons who were offered prenat...

Journal: :Human reproduction 2001
A Bos-Mikich A L Mattos A N Ferrari

BACKGROUND The need for effective parameters for selecting the best embryos is paramount when a large number of them are available for transfer. Other studies have reported that transfer of pre-selected embryos, based on cleavage to the 2-cell stage at 25 h and 27 h post-insemination/intracytoplasmic sperm injection (ICSI), increases implantation and pregnancy rates. We investigated whether ext...

Journal: :African health sciences 2012
F Nesrine H Saleh

BACKGROUND A low risk of HCV vertical transmission has been reported especially in those born to women with viraemia. Intracytoplasmic sperm injection (ICSI) being an assisted reproduction technique includes procedures that may increase risk of transmission. OBJECTIVE To determine the rate of vertical transmission of HCV to newborns born to HCV positive mothers in ICSI cycles. METHODS In a ...

Bao-Chu Chiu Fu-Shiang Peng Hsin-Fen Lu Shee-Uan Chen Sheng-Mou Hsiao, Szu-Hsing Yeh

Background We sought to determine the association between factors that affected clinical pregnancy and live birth rates in patients who underwent in vitro fertilization (IVF) and received intracytoplasmic sperm injection (ICSI) and/or laser assisted hatching (LAH), or neither. MaterialsAndMethods In this retrospective cohort study, the records of women who underwent IVF with or without ICSI and...

2014
Alexandra Gkourogianni Ioanna Kosteria Aristeidis G. Telonis Alexandra Margeli Emilia Mantzou Maria Konsta Dimitrios Loutradis George Mastorakos Ioannis Papassotiriou Maria I. Klapa Christina Kanaka-Gantenbein George P. Chrousos

BACKGROUND There have been increasing indications about an epigenetically-based elevated predisposition of assisted reproductive technology (ART) offspring to insulin resistance, which can lead to an unfavorable cardio-metabolic profile in adult life. However, the relevant long-term systematic molecular studies are limited, especially for the IntraCytoplasmic Sperm Injection (ICSI) method, intr...

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