Oocyte maturation and embryonic failure
نویسندگان
چکیده
منابع مشابه
Failure of oocyte maturation: possible mechanisms for oocyte maturation arrest.
For human IVF, the patient's ovaries are hormonally stimulated to ensure the collection of fully matured oocytes that are at the metaphase II stage. Only these oocytes can be successfully fertilized either when mixed with sperm or after ICSI. Nevertheless, in some cases immature or maturing oocytes are recovered from follicles. Surprisingly, sometimes these oocytes do not complete maturation wh...
متن کاملRole of oocyte quality in meiotic maturation and embryonic development.
The quality of oocytes plays a key role in a proper embryo development. In humans, oocytes of poor quality may be the cause of women infertility and an important obstacle in successful in vitro fertilization (IVF). The competence of oocytes depends on numerous processes taking place during the whole oogenesis, but its final steps such as oocyte maturation, seem to be of key importance. In this ...
متن کاملOOCYTE MATURATION DEFECT Oocyte Maturation Failure, Oocyte Defect Syndrome, Bad Eggs Syndrome, Meiotic Arrest, Oocyte Arrest, Maturation Arrest Of Human Oocytes
Oocyte maturation arrest is a complex problem not clearly understood; only few cases showing a complete oocyte maturation failure has been reported previously, still the exact incidence remains unknown. Failure to resume meiosis (a specialized type of cell division that reduces the chromosome number by half) in vivo may arise at one of the following three levels: absent or incomplete luteinizin...
متن کاملOOCYTE MATURATION DEFECT Oocyte Maturation Failure, Oocyte Defect Syndrome, Bad Eggs Syndrome, Meiotic Arrest, Oocyte Arrest, Maturation Arrest Of Human Oocytes
Oocyte maturation arrest is a complex problem not clearly understood; only few cases showing a complete oocyte maturation failure has been reported previously, still the exact incidence remains unknown. Failure to resume meiosis (a specialized type of cell division that reduces the chromosome number by half) in vivo may arise at one of the following three levels: absent or incomplete luteinizin...
متن کاملOocyte Maturation and Development
Sexual reproduction is essential for many organisms to propagate themselves. It requires the formation of haploid female and male gametes: oocytes and sperms. These specialized cells are generated through meiosis, a particular type of cell division that produces cells with recombined genomes that differ from their parental origin. In this review, we highlight the end process of female meiosis, ...
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ژورنال
عنوان ژورنال: Human Reproduction Update
سال: 1998
ISSN: 1355-4786,1460-2369
DOI: 10.1093/humupd/4.3.223