A comparative study on the effects of different cryoprotectants on the quality of canine sperm during vitrification process.

Cryopreservation has the capacity to extend spermatozoa's lifespan and viability. In addition, the semen samples can be collected, preserved and stored or sent to distant locations and still be used long after the death of the semen donor. In this study for the vitrification of dog sperm (fresh and swum-up sperm), different cryopreservation mediums on the basis of glycerol, milk and egg yolk were used.

Testicular biohistochemical alterations following experimental varicocele in rats.

Background: The exact pathophysiology of testicular degeneration, following varicocele has not been completely understood yet.

Objective: The current study was designed to determine the effect of varicocele on germinal epithelium (GE) cytoplasmic biohistochmical alterations.

Materials And Methods: To follow-up this study, left varicocele was induced in test groups.

Atrazine in sub-acute exposure results in sperm DNA disintegrity and nuclear immaturity in rats.

This study was designed to evaluate the detrimental effect of atrazine (ATR) on germinal epitheliums (GE) cytoplasmic carbohydrate (CH) and unsaturated fatty acids (UFA) ratio and to clarify the effect of ATR on serum levels of FSH, LH, testosterone and inhibin-B (INH-B). The impact of ATR exposure on total antioxidant capacity (TAC), sperm DNA packing and integrity were also investigated. Seventy two Wistar rats were used.

Varicocele Time-dependently Affects DNA Integrity of Sperm Cells: Evidence for Lower In vitro Fertilization Rate in Varicocele-positive Rats.

Background: We designed this study to clarify how varicocele can time-dependently affect sperm morphological parameters and DNA integrity. In this study, we intend to estimate the effect of various periods of varicocele on the in vitro fertilization (IVF) rate in rats.

Materials And Methods: In this experimental study, left varicocele were induced as the test group (n=18) which was further sub-divided into three groups based on the study termination time (4, 6 and 8 months after varicocele induction).