多精受精

多倍体主要是通过未减数配子融合，体细胞染色体加倍以及多精受精三种方式起源的。

The major cytological mechanisms of polyploid formation are union of unreduced gametes , somatic doubling and polyspermy .

结论短时受精可作为降低多精受精的一种补充办法。

Conclusion Short-time exposure of sperm can be taken as a supplement for reduction polyspermy .

结果显示，体外成熟48h的卵母细胞其多精受精率为73%，比体外成熟36h（83%）、24h（80%）的卵母细胞要低。

In oocytes matured in vitro for 48h , polyspermy ratio is 73 % , and lower than that in 36h ( 83 % ) and 24h ( 80 % ) .

卵透明带（ZP）在精卵识别、结合、穿透以及阻止多精受精和保护着床前胚胎等方面起关键作用，与男性生育关系密切。

Zona pellucida ( ZP ) plays a key role in the recognition , combination and penetration of sperms and oocytes , the prevention of multiple impregnation , the protection of embryos , and so on .

猪多精受精的超微结构研究

An ultrastructural study on the polyspermic fertilization in the pig

多精受精与卵细胞数、受精率、授精密度及时间关系的探讨

Relation between polyspermy and oocyte number , fertilization rate , insemination sperm concentration and time

提示多精受精与卵细胞数、受精率有关，与授精密度及时间无关。

These mean that there are relationship between polyspermy and oocyte number , fertilization rate but not between insemination sperm concentration and time .

方法对体外受精与胚胎移植治疗周期中胚胎质量差，不适于胚胎移植和冷冻的18个正常受精胚胎共73个细胞和3个多精受精胚胎，进行双色荧光原位杂交。

Methods Three abnormal fertilized embryos and 18 normal fertilized embryos which were not suitable for embryo transfer and cryopreservation were analyzed by dual color fluorescent in situ hybridization .

精子进入卵细胞后，在精卵的结合处会产生大的囊泡，它具有阻止其他精子进入卵细胞的作用，从而避免多精受精。

A large vesicle is formed at the joint region of the spermatozoid and the egg . The vesicle can prevent other sperms enter the egg , and avoid polyspermy .

结果显示，多精受精组卵细胞数15.54±7.16枚，受精率0.81±0.13，授精密度40.40±5.12万精子/卵细胞；

Results showed that in polyspermy group oocyte number were 15.54 ± 7.16 , fertilization rate 0.81 ± 0.13 , insemination sperm concentration 404,000 ± 51,200 progressively motile sperm / oocyte .

有多精入卵现象，极少数卵子多精受精。

Now and then , there exists the phenomenon that a few sperms penetrate into egg , while polyspermy is few .