Sperm samples were obtained from three clinically healthy mix breed domestic tomcats of 4.
Semen samples were immediately transported to the laboratory for sperm quality evaluations.
After semen collection by using an artificial vagina, sperm concentration and subjective scores of motility (wave motion) were performed.
Chromatin integrity was evaluated with toluidine blue stain ; with this procedure, sperm with normal chromatin look light blue or green, whereas dark blue or violet sperm are considered as having damaged chromatin.
The study showed that males changed their sperm velocity via semen or seminal fluid.
This rapid change in sperm speed is caused by differences in seminal fluid, not the sperm themselves.
Specifically, the average sperm concentration fell by approximately 1.
These facts show that sperm quality has fallen in recent years, as well as the increasing number of men who may have less fertile sperm.
Keywords: MSOME, Sperm, Vitrification, Zona binding assay.
Sperm cryopreservation has been used to maintain fertility in cases with cancer or for reproductive medicine procedure.
Fruit flies' oversized sperm
have been challenging to explain, says study coauthor Scott Pitnick of Syracuse University in New York.
The circadian rhythm of sperm
descent from the testes down in to the reproductive tract was assessed in sub-sterile males using the method described by Seth et al.
On the other hand, the influx of extracellular calcium into fresh sperm
leads to an increase in the production of free radicals in the cell.
sup],, For partial globozoospermia, current studies have mainly focused on structural characteristics and fertilizing capacity and the general view is that intracytoplasmic sperm
injection (ICSI) is a more suitable method than in-vitro fertilization (IVF) to obtain an acceptable fertilization rate.
cryoconservation is an important strategy for the control of reproduction, few studies have focused on these techniques for species of lutjanidae, with emphasis results obtained with Lutjanus campechanus (Poey, 1860), with Lutjanus argentimaculatus (Forsskal, 1775) (Riley et al.