Skip navigation! Story from Wellness. The new Bachelorette contestants have been announced! Yes, there are a children living right now from this contestant's donated sperm. Twenty-five-year-old Matteo Valles grew up all over the world.
To Save This Tasty Sea Snail, We Must First Figure Out What Turns It On | NRDC
Fertilization is a key physiological process for the preservation of the species. Consequently, different mechanisms affecting the sperm and the oocyte have been developed to ensure a successful fertilization. Thus, sperm acrosome reaction is necessary for the egg coat penetration and sperm-oolema fusion. Several molecules are able to induce the sperm acrosome reaction; however, this process should be produced coordinately in time and in the space to allow the success of fertilization between gametes. The goal of this study was to analyze the metabolites secreted by cumulus-oocyte-complex COC to find out new components that could contribute to the induction of the human sperm acrosome reaction and other physiological processes at the time of gamete interaction and fertilization. For the metabolomic analysis, eighteen aliquots of medium were used in each group, containing: a only COC before insemination and after 3 h of incubation; b COC and capacitated spermatozoa after insemination and incubated for 16—20 hours; c only capacitated sperm after 16—20 h in culture and d only fertilization medium as control. Six patients undergoing assisted reproduction whose male partners provided normozoospermic samples were included in the study.
To Save This Tasty Sea Snail, We Must First Figure Out What Turns It On
All rights reserved. Sperm whales' heads are filled with a mysterious substance called spermaceti. Scientists have yet to understand its function, but believe it may help the animal regulate its buoyancy.
The whale shown on the BBC1 natural history series had part of a plastic bucket caught in its mouth - but when one of the crew intervened he put his own life in danger. By Paul Jones. A mourning pilot whale mother carrying her stillborn baby that may have been poisoned by pollution left people in tears, while footage of a baby sperm whale with part of a plastic bucket caught in its mouth really drove home the problem. But what happened next to that whale?