Factors Affecting Sperm Quality Before and After Mating of Calopterygid Damselflies

Factors Affecting Sperm Quality Before and After Mating of Calopterygid Damselflies

Damselflies (Odonata: Zygoptera) have a more complex sperm transfer system than other internally ejaculating insects. Males translocate sperm from the internal reproductive organs to the specific sperm vesicles, a small cavity on the body surface, and then transfer them into the female. To examine how the additional steps of sperm transfer contribute to decreases in sperm quality, we assessed s...

The measurement of sperm motility and factors affecting sperm quality in cultured fish

The fish farming industry has been more focused on the quality of eggs or larvae rather than that of sperm, even though the quality of both gametes may affect fertilisation success and larval survival. In some species, poor sperm quality can be a limiting factor in their culture, however, even when fertilisation success is high, differences in sperm quality between males when mixed sperm from m...

Comparing Quality of Life Before and After Surgery in Patients with Cushing Disease: A Before-After Study

Factors associated with the quality before freezing and after thawing of sperm obtained by microsurgical epididymal aspiration.

OBJECTIVE To identify whether the cause, site of ductal obstruction, and characteristics of fluid aspirates are associated with the cryosurvival and fertility after thawing of sperm obtained during reconstruction of the excurrent ducts with microsurgical epididymal sperm aspiration, vasal sperm aspiration, or both. DESIGN Prospective study. SETTING Andrology center at a tertiary care instit...

Intracytoplasmic Sperm Injection – Factors Affecting Fertilization

The ICSI has become method of choice to achieve fertilization. Fertilization is possible in cases in which the sperm motility and ability to penetrate the zona pellucida are impaired. Injection is possible with sperm obtained from ejaculation, microsurgical epididymal sperm aspiration (MESA), percutaneous epididymal sperm aspiration (PESA), or testicular sperm extraction (TESE). In addition, in...