background: the particles in the range of 1-100 nm are called nanoparticles56t. gold nanoparticle is one of the most important metal nanoparticles with wide usage56t.objective: 56tthis study investigated the effects of gold nanoparticles on sperm parameters and chromatin structure in mice56t.materials and methods: 56tin this experimental study, 72 male bulb-c mice were divided into 9 groups inc...

Background The objective of this study was to evaluate the relationship between protamine deficiency, and acrosomal integrity with fertilization and pregnancy rate in patients undergone in vitro fertilization (IVF). MaterialsAndMethods Semen samples from 70 infertile couples undergoing IVF at Isfahan Fertility and Infertility center were assessed in this study. Semen analysis was carried out ac...

BACKGROUND The effects of cryoinjury were determined simultaneously on the mitochondrial function, motility, morphology and viability of ejaculated human sperm. METHOD Rhodamine 123 (R123) uptake (% of sperm) and stain intensity were used to determine sperm mitochondrial activity before and after cryopreservation from the semen of 50 men attending for infertility investigation. Morphology was...

The effect of cold storage of testes and epididymides at 4 °C for 12 h on the cryopreservation capacity of epididymal feline sperm was evaluated. Ten domestic cats were castrated, and testes and epididymides collected. Specimens were randomly assigned to two groups: in Group A, epididymal samples were immediately processed and frozen in 0.25-ml straws; in Group B, both testes and epididymides w...

BACKGROUND Intracytoplasmic sperm injection (ICSI) is the primary treatment for male infertility. However for this procedure, with the exception of visual morphological selection, there is no standardization for sperm selection. Recently, the hypo-osmotic swelling test (HOST) has been proposed to potentially select sperm with intact membranes. The aim of this study is to evaluate the ability of...

Zona pellucida (ZP) penetration, in vitro fertilization, embryo development, and the morphology of fertilizing sperm were examined through use of normospermic (> 60% structurally normal sperm/ejaculate) versus teratospermic (< 40% structurally normal sperm/ejaculate) ejaculates from domestic cats. In addition, the effect of swim-up processing on sperm-oocyte interaction was compared with that o...

For spiders, gross female spermathecal morphology has been widely used as the major predictor of sperm priority pattern depending either upon taxonomic classification or on the number of ducts that connect with the spermathecae. In order to establish whether, or to what degree, the female reproductive tract follows a cul-de-sac (one duct connects to the spermatheca) or a conduit design (two duc...

Introduction: Male infertility is an important factor of infertility in couples. In most cases it is caused by defects in sperm cell function; whether low sperm cell count or reduced motility along with altered morphology. Defects in sperm cells development are influencing enzyme activities in the seminal fluid. Aim: This research tried to determine can activity of creatine kinase (CK) in semin...