Proximal cytoplasmic droplets PCDs , a remnant of germ cell cytoplasm, are common non-specific morphological defects in bovine semen. This study evaluated the effect of higher percentages of PCDs on the quality of frozen-thawed bovine semen, embryo production and early embryo development. Semen samples were examined for: post-thaw motility, vigour of movement, concentration, sperm morphology, slow thermoresistance test STT , membrane integrity, acrosome status, mitochondrial function using fluorescent probes association FITC-PSA, PI and JC-1 and sperm chromatin integrity using acridine orange assay. Two bulls from group 2, with Higher PCD levels influenced spermatozoa quality traits. IVF and embryo development data showed that cleavage, blastocyst formation and blastocyst hatching may have been influenced by the interaction of morphology traits and individual bull effects.
If you're in the market for a bull this spring, you've got a lot to think about. There are many production considerations including calving ease, calf growth potential and the improving genetic traits in the herd. You want to get the most for your money on this big investment. As a veterinarian, I'm also concerned about some other major bull characteristics: reproductive soundness, musculoskeletal soundness and the potential to introduce disease into the herd. Reproductive and musculoskeletal soundness help ensure that he can do his job long-term.
Associations between sperm abnormalities, breed, age, and scrotal circumference in beef bulls.
Cooper, Cytoplasmic droplets: the good, the bad or just confusing? The term cytoplasmic droplets is used to mean two different structures by basic scientists and clinicians. The literature on the presence, position and loss of cytoplasmic droplets and their relationship to infertility in animal species is reviewed. Despite its discovery by Retzius as early as , the cytoplasmic droplet of spermatozoa remains an enigma. It has been variously known as a kinoplasmic droplet White et al.