_______________________________________________________________________________________ Abstract Vitrification may alter the cytoskeleton (microtubule, meiotic spindle, microfilament, etc.) and the subsequent fertilization rate of in vitro derived bovine oocytes. This study was conducted to evaluate the effect of vitrification and post-thawing incubation periods on the cytoskeleton and fertiliz...

UNLABELLED BACKGROUND Successful egg cryopreservation has many potential benefits to a variety of patients. However, a superior standard protocol describing all aspects of oocyte cryopreservation has not yet been identified. Oocyte cryopreservation is still a technical challenge for many infertility clinics. To maintain satisfactory clinical outcomes, there is a need to develop an easy to us...

background: the aim of this study was to investigate the effects of two vitrification protocols on mouse metaphase stage ii (mii) oocytes and evaluate their effects on the expression of heat shock protein a1a (hsp a1a) and mnsod genes. materials and methods: groups of approximately 15 oocytes without cumulus complexes were collected and vitrified with 10% (v/v) ethylene glycol (eg) + 10% (v/v) ...

BACKGROUND This study investigated the effect of two in vitro embryo culture systems (co-culture system versus cell-free sequential-media) on developmental competence, cryosurvival and DNA- fragmentation of in vitro developed bovine blastocysts. MATERIALS AND METHODS Bovine presumptive zygotes were cultured in Ménézo's B2 (B2) plus vero-cells or sequential synthetic oviductal fluid (SOF) for ...

OBJECTIVE To assess the usefulness of the vitrification method in clinical practice. DESIGN Clinical study of vitrification of human oocytes. SETTING A university-affiliated hospital. PATIENT(S) Thirty-four patients who agreed to undergo additional IVF-ET after the failed fresh cycle using the previously vitrified/thawed oocytes. INTERVENTION(S) Surplus oocytes from the IVF-ET patients ...

Oocyte vitrification is considered experimental in the horse with only three live foals reported. The oxidative conditions induced by could part explain poor results and melatonin, a powerful antioxidant, stimulate ROS metabolization restore mitochondrial function these oocytes. Our objective was to determine status of vitrified equine oocytes analyze effect melatonin on mitochondrial-specific ...

background: oocyte cryopreservation is one of the most important topics in the field of assisted reproductive technology to preserve women fertility, but relationship between cryopreservation and apoptosis is still a matter of debate. the present study was aimed to investigate the effects of vitrification on apoptosis in mouse oocytes by cryotop method. method: a total of 200 germinal vesicle (...

Background: Ovarian tissue cryopreservation and autotransplantation is the only fertility preservation way for prepubertal girls and situations that cytotoxic treatment is urgent. Materials and Methods: The ovaries of premature (5 weeks old) rats were autografted under cervical skin after vitrification. 3 weeks later, transplanted ovaries were removed from the body and structure of ovary, expre...

introduction: the purpose of this study was to investigate the effect of vitrification procedure on the survival, fertilization, development and ultrastructure of metaphase (mii) mouse oocyte. materials and methods: female nmri mice 6-10 weeks old were superovulated using ip injection of 10 iu hmg and 10 iu hcg. ovulated oocyte were collected from the ampullary portion of the oviducts at 12-13 ...

the effect of modified vitrification was assessed on cellular development capability in mouse embryos cultured in vitro. in this study, 466 embryos (from zygote to morula stages) were vitrified then thawed embryos have been incubated for in vitro farther development up to blastocyst stage. also, vitrification and thawing procedures were the same for all experimental groups. mouse different embr...