Polyspermy is a major puzzle in reproductive biology. In some taxa, multiple sperm enter the ovum as part of the normal fertilization process, whereas in others, penetration of the ovum by more than ...

This is a preview. Log in through your library . Abstract Previous work has established that the polyspermy block in Urechis acts at the level of sperm-egg membrane fusion. (J. Exp. Zool. 196:105).

With the help of the ESRF, researchers from Karolinska Institutet (Sweden) have discovered the reproductive mechanism that permanently blocks polyspermy — a pathologic condition that arises when more ...

Molecular biologists have used powerful new molecular biochemistry, microscopy and genetic techniques to solve, in unprecedented detail, the mechanisms of how flowering plants avoid polyspermy.

Zinc flux during fertilization prevents polyspermy and improves the quality of embryo Zinc is released after fertilization helps in zona pellucida hardening Zinc spark is a calcium coordinated event ...

Some men produce too many sperms. That little-mentioned fact was the focus of my previous blog post. (See Why Too Many Sperms Spoil the Egg, posted on August 11, 2017.) With too many sperms, an ...

Infertility affects around 15% of couples worldwide, according to the World Health Organization (WHO). Some cases of infertility are associated with mutations in the genes that are responsible for egg ...

Some men produce too many sperms. That little-mentioned fact was the focus of my previous blog post. (See Why Too Many Sperms Spoil the Egg, posted on August 11, 2017.) With too many sperms, an ...