Results 211 to 220 of about 106,911 (262)
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Quality control of embryo development
Molecular Aspects of Medicine, 2013Although 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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Ovarian stimulation and embryo quality
Reproductive BioMedicine Online, 2009To study the effects of different ovarian stimulation approaches on oocyte and embryo quality, it is imperative to assess embryo quality with a reliable and objective method. Embryos rated as high quality by standardized morphological assessment are associated with higher implantation and pregnancy rates.
Baart, Esther +2 more
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Quantification of embryo quality by respirometry
Theriogenology, 2007It 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 +2 more
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Contribution of the oocyte to embryo quality
Theriogenology, 2006The 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 +3 more
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Production and Quality of Bovine Oocytes and Embryos
Veterinary Research Communications, 2004Many 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 +7 more
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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 +2 more
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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 +2 more
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Influence of the male on embryo quality
Theriogenology, 2007Early 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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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 +6 more
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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 +6 more
openaire +2 more sources