Results 251 to 260 of about 264,880 (269)
Some of the next articles are maybe not open access.
Oocyte cryopreservation: oocyte assessment and strategies for improving survival
Reproduction, Fertility and Development, 2007Despite significant progress in cryopreservation of mammalian oocytes and embryos, many of the molecular and biochemical events that underlie this technology are poorly understood. In recent years, researchers have focused on obtaining viable oocytes that are developmentally competent. Even under the most favourable conditions, experimental approaches
LEDDA, Sergio +6 more
openaire +4 more sources
Hydrobiologia, 2005
The morphological features of polychaete ovarian morphology and oogenesis are reviewed. Some basic information on ovarian structure and/or oogenesis is known for slightly more than half of recognized polychaete families although comprehensive studies of oogenesis have been conducted on ∼0.1% of described species. Relative to other major metazoan groups,
openaire +2 more sources
The morphological features of polychaete ovarian morphology and oogenesis are reviewed. Some basic information on ovarian structure and/or oogenesis is known for slightly more than half of recognized polychaete families although comprehensive studies of oogenesis have been conducted on ∼0.1% of described species. Relative to other major metazoan groups,
openaire +2 more sources
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.
openaire +2 more sources
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
Gamete Research, 1989
AbstractHamster oocytes were frozen using a 1,2‐propanediol‐sucrose procedure, which resulted in over 90% survival. After thawing and zona removal the oocytes were compared with non‐frozen oocytes in a zona‐free hamster egg test employing spermatozoa from human semen donors and suspected infertility patients. Similar data were obtained, indicating that
Ralph B. L. Gwatkin +2 more
openaire +3 more sources
AbstractHamster oocytes were frozen using a 1,2‐propanediol‐sucrose procedure, which resulted in over 90% survival. After thawing and zona removal the oocytes were compared with non‐frozen oocytes in a zona‐free hamster egg test employing spermatozoa from human semen donors and suspected infertility patients. Similar data were obtained, indicating that
Ralph B. L. Gwatkin +2 more
openaire +3 more sources
Cryoconservation: Sperms and Oocytes
1997From the moment of fertilization onwards, life processes run by the rhythm of a biological clock. The technology of cryopreservation gives us the possibility of interfering with the clockwork by stopping biological time. Cryopreservation of a cell therefore involves the cooling of a cell and storage at a temperature where all metabolic processes are ...
Van Steirteghem, Andre +2 more
openaire +4 more sources
Maturitas, 1998
Correlations between parental age, aneuploidy in germ cells and recent findings on aetiological factors in mammalian trisomy formation are reviewed.Data from observations in human oocytes, molecular studies on the origin of extra chromosomes in trisomies, experiments in a mouse model system, and transgenic approaches are shown.Errors in chromosome ...
openaire +3 more sources
Correlations between parental age, aneuploidy in germ cells and recent findings on aetiological factors in mammalian trisomy formation are reviewed.Data from observations in human oocytes, molecular studies on the origin of extra chromosomes in trisomies, experiments in a mouse model system, and transgenic approaches are shown.Errors in chromosome ...
openaire +3 more sources
Cellular and dynamic aspects of oocyte growth in teleosts
, 1981SYNOPSIS. Four principal stages of oocyte growth are recognized among teleosts. During gonadotropin-independent primary growth, multiple nucleoli form as well as a Balbiani body which eventually disperses throughout the ooplasm.
R. Wallace, K. Selman
semanticscholar +1 more source
Pregnancies after intracytoplasmic injection of single spermatozoon into an oocyte
The Lancet, 1992G. Palermo +3 more
semanticscholar +1 more source
Reconstitution of the oocyte transcriptional network with transcription factors
Nature, 2020Nobuhiko Hamazaki +12 more
semanticscholar +1 more source
The efficiency of oocyte vitrification for donor oocyte cycles and oocyte banking in ART
Fertility and Sterility, 2010Terry Schlenker +3 more
openaire +2 more sources