It has, however, become apparent that none of these procedures are sufficient for the determination of male fertility capacity. Owing to the lack of adequate methods to evaluate the fertility potential of a couple, the choice of ART method is made more or less blindly. A continuous search for...
Spermatazoa are the male gamete,meaning they are the cells that fuse with the egg in fertilization giving rise to the embrion and future baby.
remains unknown. We show that codas exhibit contextual and combinatorial structure. First, we report previously undescribed features of codas that are sensitive to the conversational context in which they occur, and systematically controlled and imitated across whales. We call these rubato and ornamentati...
In addition, sperm quality related miRs have also been analyzed in good and bad zebrafish breeders. All of these miRs (miR-122-5p, miR 141-3p and miR-200a-5p) were previously defined as molecular markers in human sperm11, and they are differentially present in normozoospermic when compare...
Once the sperm are transferred to the female tract in spermatophores, marked changes occur in the sheath; the satellite body disappears, dense material appears between the inner margins of the radial discs, and the inner sheath differentiates into two distinct portions, both of which have a para...
Since sperms arevery small cells, their reduced volume prevents the intracellular formation of ice crystals, which could damage their structure. This is the reason why contrary to what happens with embryos and egg cells, slow freezing procedures work well and continue to be used for freezing sper...
Previous research in this field has been described in international patent specification no. WO 96/25495, to which reference should be made for a full understanding of, and as background to, the present application. The contents of WO 96/25495 are therefore incorporated herein by reference. ...
Due to the unique nature of spermatozoa, which are transcriptionally and translationally silent, the regulation of capacitation is based on the formation of posttranslational modifications of proteins (PTMs). However, the interactions between different t
But in the meantime, the information learned from the mouse models could help “correct failing tissues and organs,” Zernicka-Goetz said. The mystery of human life The early weeks after fertilization are made up of these three different stem cells communicating with one another chemically and ...
chromatin structure assay (SCSA) as well as conventional methods to assess sperm quality in sexually mature male sheep in which testicular mass was changing under the influence of nutrition. 2. Materials and methods The experimental protocol was approved by the Animal Ethics Committee of the CSI...