Polyspermy - Wikipedia
In biology, polyspermy describes the fertilization of an egg by more than one sperm. Diploid organisms normally contain two copies of each chromosome, one from each parent. The cell …
Gamete Fusion and the Prevention of Polyspermy
The entrance of multiple sperm— polyspermy —leads to disastrous consequences in most organisms. In the sea urchin, fertilization by two sperm results in a triploid nucleus, in which …
Polyspermy - an overview | ScienceDirect Topics
Polyspermy is a lethal condition where more than one sperm nucleus interacts with the female nucleus. This article looks at how animals avoid this condition in nature and shows that sperm …
Polyspermy - an overview | ScienceDirect Topics
In general, the entry of more than two spermatozoa into the egg cytoplasm, referred to as polyspermy, causes aberrant effects on meiosis completion or embryo development and …
Polyspermy - an overview | ScienceDirect Topics
Polyspermy occurs when two or more spermatozoa enter the cytoplasm of a single oocyte. In mammals this usually leads to abnormal fertilization and embryonic death, but in some other …
Polyspermy - FertilitySmarts
Polyspermy refers to the fertilization of one egg with multiple sperm cells that result in the formation of an embryo with abnormal sets of chromosomes. This typically happens with …
The biology and evolution of polyspermy: insights from cellular …
Polyspermy occurs when the oocyte is penetrated by more than one sperm and can be pathological because an excess of centrosomes compromises development. However, in …
Molecular Reproduction & Development - Wiley Online Library
2020年3月27日 · Polyspermy is a major cause of triploidy with up to 80% of triploid conceptuses being the result of dispermic fertilization. The mammalian female reproductive tract regulates …
Two pathways regulate cortical granule translocation to …
2016年12月19日 · Inhibiting cortical granule translocation severely impaired the block to sperm entry, suggesting that translocation defects could contribute to miscarriages that are caused …
Biology of Polyspermy in IVF and its Clinical Indication
2013年9月6日 · Extensive studies and reviews have summarized the polyspermy block in mice and large animals. This review focuses on new discoveries, oocyte quality, multiploidy, ability …