Introduction The interest for canine semen preservation and artificial insemination (AI) is steadily increasing worldwide, yet comparatively few studies are published each year within this field, and it is particularly difficult to find data from artificial inseminations using fresh semen, or semen preserved according to various methods for chilling, or freezing and thawing, and also comparing ...

The present study was conducted to evaluate the in vivo fertility of frozen thawed boar semen. Twenty ejaculates collected from six mature boars were frozen in a programmable freezer. After freezing the semen was evaluated for different sperm quality parameters. Twenty five sows were inseminated artificially utilizing frozen thawed semen. The percentage of sperm motility, live sperm, live intac...

This study investigated the relationship between acrosin activation and pig sperm proacrosin binding protein (sp32) phosphorylation levels. Differently processed pig spermatozoa (fresh semen sperm, capacitation sperm, acrosome reaction sperm, capacitation-like sperm, and thawed sperm) were subjected to sodium dodecyl sulfate polyacrylamide gel electrophoresis and Western blot analysis. The fres...

Standardized sperm concentration and volume:volume extension were compared as dilution rates for canine semen freezing. Six proven stud dogs were submitted to two seminal collections by manual stimulation. Semen was evaluated and extended in tris plus egg-yolk and glycerol according to two different dilution rates. The first one was based on a standardized sperm concentration of 200x10 spermato...

There are various advantages, such as the preservation of genetic resources, an improvement of the reproduction performance in summer, long-distance transportation of semen and the possibility of progeny test, in the cryopreservation technique of boar semen. However, cryopreserved boar spermatozoa have not been routinely available to swine artificial insemination (AI) due to the lower conceptio...

Introduction While conception rates following cervical insemination of synchronised ewes with fresh semen are generally around 60-70%, conception rates with frozen-thawed semen are unacceptably low (<20% generally). These poor conception rates following cervical insemination with frozen-thawed semen appear to stem from two inter-related factors which are additive in their negative impacts: (a) ...

OBJECTIVES To examine patient compliance, significance of rare nonmotile sperm (RNMS) and to determine the timing and number of semen analyses required to confirm sterility. PATIENTS AND METHODS From November 2001 to November 2004, 436 consecutive primary vasectomies were performed by one surgeon. All patients were instructed to submit two initial semen specimens for analysis (2 and 3 months ...