Results 361 to 370 of about 415,920 (397)
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Seminars in Reproductive Medicine, 2000
The oocyte is dependent on granulosa cells to provide nutrients and regulatory signals. Granulosa cells must be at the appropriate stage of differentiation to initiate these signals and transmit them to the oocyte. Studies have shown that in vitro-matured oocytes from follicles in early stages of atresia are more competent to support embryonic ...
F L, Barnes, M A, Sirard
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The oocyte is dependent on granulosa cells to provide nutrients and regulatory signals. Granulosa cells must be at the appropriate stage of differentiation to initiate these signals and transmit them to the oocyte. Studies have shown that in vitro-matured oocytes from follicles in early stages of atresia are more competent to support embryonic ...
F L, Barnes, M A, Sirard
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Immature oocyte retrieval with in-vitro oocyte maturation
Current Opinion in Obstetrics and Gynaecology, 1999Early studies of in-vitro fertilization used immature oocytes. The process evolved to retrieving metaphase II oocytes, and was eventually successful. At present, aggressive ovulation induction protocols are the mainstay of assisted reproductive technology programs, but not without increased cost, multiple gestations, morbidity, potential future risks ...
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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
Placenta, 2008
Over the last few years, there has been renewed interest and scientific debate concerning human oocyte cryopreservation. The aim of this study was to analyse the clinical data coming from our long experience of slow-freezing oocytes. Between 2001 and 2007, 1280 thawing cycles were carried out using oocytes previously frozen by means of a slow 1,2 ...
E, Albani +5 more
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Over the last few years, there has been renewed interest and scientific debate concerning human oocyte cryopreservation. The aim of this study was to analyse the clinical data coming from our long experience of slow-freezing oocytes. Between 2001 and 2007, 1280 thawing cycles were carried out using oocytes previously frozen by means of a slow 1,2 ...
E, Albani +5 more
openaire +2 more sources
Seminars in Reproductive Medicine, 2001
Human oocyte cryopreservation is potentially an alternative solution to the ethical problems arising from embryo storage. In addition, oocyte freezing is the only method to preserve the reproductive capacity for women at risk of losing it because of premature ovarian failure, pelvic diseases, surgery, or antineoplastic treatments.
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Human oocyte cryopreservation is potentially an alternative solution to the ethical problems arising from embryo storage. In addition, oocyte freezing is the only method to preserve the reproductive capacity for women at risk of losing it because of premature ovarian failure, pelvic diseases, surgery, or antineoplastic treatments.
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The biochemical basis of an all-or-none cell fate switch in Xenopus oocytes.
Science, 1998Xenopus oocytes convert a continuously variable stimulus, the concentration of the maturation-inducing hormone progesterone, into an all-or-none biological response-oocyte maturation.
J. Ferrell, E. Machleder
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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 ...
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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 ...
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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 ...
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Best Practice & Research Clinical Obstetrics & Gynaecology, 2002
Oocyte donation affords women with ovarian failure, advanced reproductive age, heritable conditions or recurrent implantation failure the ability to conceive. Recipients must be medically screened carefully prior to attempting pregnancy. Egg donors should also be healthy and pose no infectious or genetic risk to the recipient or offspring.
Jeffrey, Klein, Mark V, Sauer
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Oocyte donation affords women with ovarian failure, advanced reproductive age, heritable conditions or recurrent implantation failure the ability to conceive. Recipients must be medically screened carefully prior to attempting pregnancy. Egg donors should also be healthy and pose no infectious or genetic risk to the recipient or offspring.
Jeffrey, Klein, Mark V, Sauer
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Trends in Cell Biology
Animal oocytes face extreme challenges. They remain dormant in the body for long periods of time. To support offspring development and health, they need to store genetic material and maternal factors stably and at the same time manage cellular damage in a reliable manner.
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Animal oocytes face extreme challenges. They remain dormant in the body for long periods of time. To support offspring development and health, they need to store genetic material and maternal factors stably and at the same time manage cellular damage in a reliable manner.
openaire +2 more sources