Coiled tail in sperm

Duration: 6min 23sec Views: 908 Submitted: 17.08.2020
Category: Mature
Yeung, F. Bergmann, V. Nordhoff, E. Vorona, Trevor G. There is no systematic study on coiled sperm in semen, although they are commonly observed. This work characterizes coiled sperm in infertile men to understand the clinical implications and investigate the possible cause by osmotic swelling.

Sperm Morphology (Size and Shape)

Sperm Morphology | Loma Linda University Center for Fertility & IVF

Sperm morphology refers to the shape of the sperm, which includes head size and head DNA content revealed by a nuclear color stain , the midpiece appearance and the structure of the tail. Sperm morphology is assessed during routine semen analysis that examines the sperm cells under a microscope. The semen analysis will also examine the motility movement ability and concentration of sperm present. Every male, fertile or infertile, has varying percentages of abnormally-shaped sperm. There are many factors that can lead to abnormally shaped sperm including increased testicular temperature, exposure to toxic chemicals, infection and genetic traits.

Background: There is no systematic study on coiled sperm in semen, although they are commonly observed. This work characterizes coiled sperm in infertile men to understand the clinical implications and investigate the possible cause by osmotic swelling. Methods: Coiled sperm in semen from infertile patients were quantified and their ultrastructure examined by electron microscopy. Hypo-osmotic swelling HOS and demembranation tests were performed to elucidate the nature of the coiling. Electron microscopy revealed coiling of tail filaments within the plasma membrane, resembling HOS.
Sperm morphology — the size and shape of sperm — is one factor that's examined as part of a semen analysis to evaluate male infertility. Sperm morphology results are reported as the percentage of sperm that appear normal when semen is viewed under a microscope. Normal sperm have an oval head with a long tail. Abnormal sperm have head or tail defects — such as a large or misshapen head or a crooked or double tail.