BACKGROUND The proteolytic chaperone peptide ubiquitin accumulates in defective human spermatozoa. Immunodetection of ubiquitin in human sperm samples correlates with semen quality and male fertility. METHODS Semen samples from 93 men from couples seeking infertility treatment were separated on a PureSperm density gradient and screened by immunofluorescence microscopy with anti-ubiquitin anti...

A priori determination of the sex of a human individual before gestation is a desirable goal in some cases. To achieve this, it is necessary to perform the separation of sperm cells containing either X or Y chromosomes. As is well known, male sex depends on the presence of chromosome Y. Once this separation is achieved in principle, we require to determine, with a high degree of accuracy, wheth...

Sperm selection is a clinical need for guided fertilization in men with low-quality semen. In this regard, microfluidics can provide an enabling platform the precise manipulation and separation of high-quality sperm cells through applying various stimuli, including chemical agents, mechanical forces, thermal gradients. addition, microfluidic platforms help to guide sperms oocytes controlled vit...

Sperm dimensions and the question of whether X and Y chromosome-bearing sperm differ in size or shape has been of great interest, especially for the development of alternative methods to sort or classify sperm cells. The aim of the present study was to evaluate possible differences in the shape and size of the sperm head between X and Y chromosome-bearing sperm by atomic force microscopy (AFM)....

Vaginal swabs taken in rape cases usually contain epithelial cells from the victim and sperm from the assailant and forensic DNA analysis requires separation of sperm from these cell mixtures. PH-20, which is a glycosylphosphatidylinositol-anchored hyaluronidase located on the head of sperm, has important functions in fertilization. Here we describe a newly developed method for sperm isolation ...

Background: Several methods for sex selection of embryos have been used in research centers and infertility centers till now. Materials and Methods: In this research, the effect of medium, by placing the mouse (NMRI) spermatozoa in the medium containing certain concentrations of albumin and ascorbic acid, separation of spermatozoa containing X and Y chromosomes and doing in vitro fertilization ...

The sperm mobility assay used in the present study measures the rate of sperm penetration in a biologically inert cell-separation solution (Accudenz). When a sample of sperm is overlaid in a cuvette containing Accudenz, sperm penetrate the solution and absorbance of the sample can be measured with a spectrophotometer. This assay has been successfully used to select chicken and turkey semen dono...

It has long been appreciated that spermiogenesis, the cellular transformation of sessile spermatids into motile spermatozoa, occurs in the absence of new DNA transcription. However, few studies have addressed whether the physical presence of a sperm nucleus is required either during spermiogenesis or for subsequent sperm functions during egg activation and early zygotic development. To determin...

BACKGROUND Intrauterine insemination (IUI) could become preferred to more invasive and expensive techniques of assisted reproduction therapy (ART) and should be offered as the first choice in cases with no female factors and mild male factor subfertility. However, developing countries and especially their rural areas often lack the necessary equipment and laboratory facilities. OBJECTIVE To d...