Results 271 to 280 of about 200,813 (309)
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Ugeskrift for laeger, 2021
The number of treatments with donated oocytes has risen markedly in Denmark during the latest decade due to changes in legislation and because female age is increasingly advanced when fertility treatment is warranted. Today, oocyte donation is a standard procedure offering the otherwise untreatable a high chance of achieving a pregnancy.
Larsen, Elisabeth Clare +2 more
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The number of treatments with donated oocytes has risen markedly in Denmark during the latest decade due to changes in legislation and because female age is increasingly advanced when fertility treatment is warranted. Today, oocyte donation is a standard procedure offering the otherwise untreatable a high chance of achieving a pregnancy.
Larsen, Elisabeth Clare +2 more
openaire +2 more sources
Cloning and Stem Cells, 2005
In assisted human reproduction, the cytoplasm of oocytes recovered from follicles is often abnormal. Its lower quality, especially in older patients, may be responsible for certain chromosomal abnormalities or developmental arrest. Thus, the deficiency of some vital molecules, which are necessary for oocyte maturation, can be the cause of infertility ...
FULKA J. JR +3 more
openaire +3 more sources
In assisted human reproduction, the cytoplasm of oocytes recovered from follicles is often abnormal. Its lower quality, especially in older patients, may be responsible for certain chromosomal abnormalities or developmental arrest. Thus, the deficiency of some vital molecules, which are necessary for oocyte maturation, can be the cause of infertility ...
FULKA J. JR +3 more
openaire +3 more sources
Biochimie, 1979
The main elements of reproduction are exposed with emphasis on its preparation during the larval stage. The system oocyte-nurse cells-follicular cells is described and the principal features of egg morphogenesis are indicated. Two types of problems are concentrated on : 1) sequential determination of growth and evolution of the follicle in the ovarian ...
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The main elements of reproduction are exposed with emphasis on its preparation during the larval stage. The system oocyte-nurse cells-follicular cells is described and the principal features of egg morphogenesis are indicated. Two types of problems are concentrated on : 1) sequential determination of growth and evolution of the follicle in the ovarian ...
openaire +2 more sources
Current Opinion in Obstetrics and Gynecology, 1992
Use of donor oocytes is becoming an increasingly important facet of assisted reproductive technology programs. Candidates for donor oocytes include women with premature ovarian failure or severe genetic disorders, women who respond poorly to human menopausal gonadotropin, and women older than 40 years who do not conceive with used of other therapies ...
openaire +2 more sources
Use of donor oocytes is becoming an increasingly important facet of assisted reproductive technology programs. Candidates for donor oocytes include women with premature ovarian failure or severe genetic disorders, women who respond poorly to human menopausal gonadotropin, and women older than 40 years who do not conceive with used of other therapies ...
openaire +2 more sources
Cumulus–Oocyte Complex Interactions During Oocyte Maturation
2004In most mammals, the oocyte in the Graafian follicle is surrounded by tightly packed layers of cumulus cells, forming the cumulus-oocyte complex. During the preovulatory period, cumulus cells change from a compact cell mass into a dispersed structure of cells for the synthesis and deposition of a mucoid intercellular matrix, a process referred to as ...
Masaki, Yokoo, Eimei, Sato
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Current Opinion in Obstetrics & Gynecology, 2009
This review summarized the clinical breakthroughs in the human oocyte cryopreservation field in the past 2 years and gave special emphasis on the role of vitrification method. Human oocyte cryopreservation is an attractive strategy to preserve female fertility, as it offers more opportunities to the future destination of the female gametes and also ...
Tao, Tao +2 more
openaire +2 more sources
This review summarized the clinical breakthroughs in the human oocyte cryopreservation field in the past 2 years and gave special emphasis on the role of vitrification method. Human oocyte cryopreservation is an attractive strategy to preserve female fertility, as it offers more opportunities to the future destination of the female gametes and also ...
Tao, Tao +2 more
openaire +2 more sources
Hospital Medicine, 2001
Despite early success with sperm and embryo cryopreservation, human oocyte cryopreservation has met with limited success both in terms of survival and subsequent fertilization. However, compared with embryo cryopreservation, oocyte freezing has great potential for eliminating the ethical and legal problems of embryo storage.
O, Salha +3 more
openaire +2 more sources
Despite early success with sperm and embryo cryopreservation, human oocyte cryopreservation has met with limited success both in terms of survival and subsequent fertilization. However, compared with embryo cryopreservation, oocyte freezing has great potential for eliminating the ethical and legal problems of embryo storage.
O, Salha +3 more
openaire +2 more sources
Animal Reproduction Science, 2000
The penetration of the zona pellucida is a crucial step during fertilization. Spermatozoa that are unable to recognize and bind to the zona pellucida glycoproteins or respond to the zona pellucida by undergoing the acrosome reaction fail to fertilize the egg.
E, Töpfer-Petersen +2 more
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The penetration of the zona pellucida is a crucial step during fertilization. Spermatozoa that are unable to recognize and bind to the zona pellucida glycoproteins or respond to the zona pellucida by undergoing the acrosome reaction fail to fertilize the egg.
E, Töpfer-Petersen +2 more
openaire +2 more sources
Stella safeguards the oocyte methylome by preventing de novo methylation mediated by DNMT1
Nature, 2018Yingfeng Li, Zhuqiang Zhang, Jiayu Chen
exaly