Apart from sperm
factors in induction of oocyte activation, the oocyte contents, especially glutathione, seem to be the requisites for disulfide bonds reduction in the sperm
nucleus and promotion of male pronuclear formation during fertilization (6,37).
Experiment 2: We evaluated the individual effect on sperm
motility after percoll gradient selection for each cat.
robusta, eggs release a sperm-activating and attracting sulfate steroid (SAAF) from the vegetal pole, which can influence sperm
directionality and speed (Yoshida et al., 1993, 2002).
head is composed by chromatin (DNA condensed by protamine proteins), the chromatin integrity, the shape sperm
head and the sperm
head morphometry should be related, and several studies have been published.
(https://www.sciencedaily.com/releases/2019/08/190813143855.htm) What the Japanese scientists developed is a new and easier way to choose the sex of offspring by separating X and Y sperm
, a task heretofore considered complex and cumbersome.
's journey is fraught with obstacles, meaning the weaklings fall by the wayside and only the fittest survive to claim the prize of the ovum.
Research at Gagneux's lab at the University of California, San Diego, revealed of a "secret handshake" between sperm
and the cells lining the uterus.
aneuploidy by FISH protocol: FISH was standardized based on Sarrate et al.
The research may explain a major cause of male infertility and open up the possibility of using sperm
taken directly from the testicles to overcome infertility among males.
He said: "Sperm
counts are declining at such a rapid rate it isn't just to do with genetics.
Some researchers believed that reactive oxygen species (ROS) generation increases during the cooling of sperm
. (4) Therefore, many attempts have been made to attenuate the cold shock damages through the use of antioxidants.
However, not everyone seems to be a fan of men who treat sperm
donation as some sort of hobby, no matter how altruistic their intentions may be.