نتایج جستجو برای: intracytoplasmic injection

تعداد نتایج: 159581  

2009
Paula Stein

Intracytoplasmic sperm injection (ICSI) is not only used in human assisted reproduction (ART), but it is also widely employed for veterinary in vitro fertilization during rare species preservation, germ-line rescue of transgenic animals or for any veterinary assisted conception. Piezo-assisted ICSI, which was first described in 1995 [1], can be employed for assisted conception in animals in whi...

Journal: :Reproductive biomedicine online 2010
Murid Javed Navid Esfandiari Robert F Casper

Intracytoplasmic sperm injection (ICSI) has resulted in pregnancy and birth for many couples, including those with severe male factor infertility. However, even after ICSI, complete failure of fertilization occurs in 1-3% of cycles. Most cases occur due to low number of mature oocytes, failure of oocyte activation or non-availability of appropriate spermatozoa for injection. Given the significa...

Journal: :Human reproduction 1998
S J Silber

There no longer seem to be any categories of male factor infertility that cannot be treated with intracytoplasmic sperm injection (ICSI). Even for men with azoospermia caused either by obstruction or by germinal failure, ICSI may be performed successfully. The only failures will be in azoospermic men who have neither spermatozoa nor spermatids retrievable from the testis, but these men comprise...

Journal: :British medical bulletin 2000
A J Campbell D S Irvine

Micro-assisted fertilization in the form of intracytoplasmic sperm injection (ICSI) has truly revolutionised the treatment options for couples with impaired semen quality, and those with both obstructive and non-obstructive azoospermia. In general, the major issues which relate to the success of ICSI are those related to the success of conventional IVF, and the high multiple pregnancy rate rema...

2005
Ahmed Rashed Alhimaidi

Intracytoplasmic sperm injection (ICSI) is used to fertilize oocytes by delivering spermatozoa directly into the ooplasm using micromaniplating devices. Mammalian ICSI, was initially designed to examine the fertilization steps in ooplasm.1 ICSI has wide clinical application and become the method of choice to help overcome male infertility, however, the survival rates and fertilization rates of ...

Journal: :BioEssays : news and reviews in molecular, cellular and developmental biology 1999
J Tesarik C Mendoza

Intracytoplasmic sperm injection (ICSI) is the latest, and by far the most efficient, variant of micromanipulation-assisted fertilization, whereby a single spermatozoon is selected, aspirated into a microinjection needle and injected to the oocyte cytoplasm. The development of this technique is mainly linked to application in human assisted reproduction for which it enables fertilization with d...

2012
Lodovico Parmegiani Graciela Estela Cognigni Marco Filicori

In these last twenty years, intracytoplasmic sperm injection (ICSI) has efficiently permitted the treatment of male factor infertility (Van Steirteghem et al., 1993); the direct injection of spermatozoa into ooplasm has allowed the embryologist to overcome low sperm motility, poor sperm-Zona Pellucida (ZP) binding, and defective acrosome reaction. Although ICSI has been successfully applied wor...

Journal: :Human reproduction 1998
C Bourgain Z P Nagy H De Zutter H Van Ranst D Nogueira A C Van Steirteghem

The ultrastructure of 18 metaphase-II oocytes after intracytoplasmic sperm injection (ICSI) was analysed from 30 min to 8 h following the microinjection. Three control metaphase-II oocytes were not injected. The 21 oocytes were embedded individually and examined in serial pole-to-pole sections. Seventeen oocytes had been matured in vitro from the germinal vesicle stage and showed ultrastructura...

Journal: :Human reproduction 2000
H Zech P Vanderzwalmen Y Prapas B Lejeune E Duba R Schoysman

Spermatid microinjection into oocytes was applied in cases of intracytoplasmic sperm injection (ICSI)/testicular sperm extraction (TESE) where no spermatozoa could be found in numerous testicular samples. Although several pregnancies were obtained with this procedure, serious concerns remain regarding its safety. Although the relevance of the injection of spermatids is by no means certain, we w...

2005
Hui Liu Ash Kshirsagar Jessica Ku Dolores Lamb Craig Niederberger

Intracytoplasmic sperm injection (ICSI), a procedure in which a single sperm is microinjected into an ovum, presents a difficult modeling problem highly sensitive to both underand overfitting. We modeled an ICSI data set of 528 outcomes with a variety of clinical and laboratory variates using linear and non-linear (neural computational) logistic regression methods and with linear and radial bas...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید