Results 251 to 260 of about 117,827 (298)

Quality control of embryo development

Molecular Aspects of Medicine, 2013
Although in recent years we have seen an undeniable improvement in the field of reproductive biology and medicine, the efficiency of in vitro fertilization (IVF) procedures remains relatively low, ranging from 4% to 40% depending on the patient's age. It is believed that this is in a large part caused by inaccurate assessment of embryo quality prior to
Ajduk, Anna, Zernicka-Goetz, Magdalena
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Quantification of embryo quality by respirometry

Theriogenology, 2007
It is generally accepted that assessment of embryo metabolism, in particular oxygen consumption, may improve embryo selection by identifying the embryos with higher developmental competence. Several methods have been employed to measure embryonic oxygen consumption, but most of them were detrimental to subsequent embryo development.
Lopes, Ana S, Greve, Torben, Callesen, Henrik; id_orcid 0000-0002-0185-7300   +2 more
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Contribution of the oocyte to embryo quality

Theriogenology, 2006
The ability of a bovine embryo to develop to the blastocyst stage, to implant and to generate a healthy offspring is not a simple process. To clarify the importance of the contribution of the oocyte to the embryo quality, it is important to define more precisely the different types of competence expressed by oocytes.
Marc-André, Sirard, François, Richard, Patrick, Blondin, Claude, Robert   +3 more
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Production and Quality of Bovine Oocytes and Embryos

Veterinary Research Communications, 2004
Many factors influence the efficiency of the in vitro embryo production technology in cattle but the most important are the physiological conditions of the donor and the culture protocols for oocyte maturation and fertilization and for embryo culture from zygote to blastocyst.
GALLI, CESARE, Duchi R., Crotti G., Turini P., Ponderato N., Colleoni S., Lagutina I., Lazzari G.   +7 more
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Embryo Quality Assessment

Journal SOGC, 1995
Abstract Multiple pregnancy is a common complication of in vitro fertilization (IVF). Embryo quality assessment may allow us to reduce significantly the risk of multiple births by transferring two instead of three pre-embryos per cycle of IVF. So far, the assessment of embryo quality has been mainly morphological, which correlates with the chances of ...
Robert Hemmings, Tommaso Falcone, Pierre Miron   +2 more
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Influence of the male on embryo quality

Theriogenology, 2007
Early pregnancy failure or loss (EPL) represents a major source of wastage and inefficiency in livestock production systems. Although successful embryo development is dependent upon genetic and epigenetic contributions from both the male and female, potential adverse male affects on embryo quality and development are probably often underestimated.
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Embryo quality and pregnancy potential of fresh compared with frozen embryos--is freezing detrimental to high quality embryos?

Human reproduction (Oxford, England), 1995
To determine the effect of cryopreservation on embryo quality and the pregnancy potential of embryos, donated oocytes from the same donor (n = 24) were randomly allocated, with subsequent transfer to two or more different ovum recipients resulting in at least one fresh and one frozen embryo transfer cycle from the same cohort of oocytes.
C E, Selick, G E, Hofmann, C, Albano, G M, Horowitz, A B, Copperman, G J, Garrisi, D, Navot   +6 more
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Influence of sperm parameters on embryo quality

Fertility and Sterility, 1993
To evaluate the influence of sperm defects on embryo quality.Retrospective study.In vitro fertilization center.Embryo transfers (710) from IVF attempts for tubal disease (626) or male infertility (84).Embryo morphology as a function of causes of infertility, semen, and follicular growth parameters. Embryos were classified into three groups according to
J, Parinaud, R, Mieusset, G, Vieitez, B, Labal, G, Richoilley   +4 more
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Cumulus mass maintains embryo quality

Fertility and Sterility, 1994
To determine if co-culture of early stage embryos with their own cumulus mass improves embryo quality.Before insemination, cumulus masses along with cumulus matrices were separated from the oocytes surrounded by a few remaining cumulus cells. Fourteen hours after insemination, fertilized oocytes were each placed onto the cumulus cells, and matrix and ...
H, Saito, T, Hirayama, K, Koike, T, Saito, M, Nohara, M, Hiroi   +5 more
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Effect of semen quality on the embryo development

Journal of Huazhong University of Science and Technology [Medical Sciences], 2006
To investigate the influences of sperm quality on the zygotes and embryos development, as the role of the paternal factor in early human embryogenesis is gaining more attention because of the application of techniques such as intracytoplasmic sperm injection (ICSI) for the treatment of men infertility. 136 infertility couples with men factors (Group I )
Ying, Gao, Hanqin, Cheng, Yuhong, Gen, Genhong, Mao, Ying, Liang, Hongfa, Li   +5 more
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