Temperature-induced sperm nuclear vacuolisation is dependent on sperm preparation

Area of Science:

• Andrology
• Spermatozoa Biology
• Infertility Research

Background:

• Sperm nuclear vacuoles are indicators of sperm quality.
• Incubation conditions can potentially affect sperm nuclear morphology.

Purpose of the Study:

• To investigate the influence of incubation temperature on sperm nuclear vacuolisation.
• To determine if sperm preparation methods affect nuclear vacuolisation during incubation.

Main Methods:

• Two experiments were conducted using motile spermatozoa from human patients.
• Sperm were prepared using swim-up or washing techniques.
• Incubation occurred at room temperature or 37°C, with vacuolisation assessed via microscopy.

Main Results:

• Incubation temperature (room temperature vs. 37°C) did not significantly alter sperm nuclear vacuolisation in swim-up prepared sperm.
• Washed sperm incubated at 37°C showed a significant increase in nuclear vacuolisation compared to baseline.
• Swim-up prepared sperm incubated at 37°C did not show a significant increase in nuclear vacuolisation.

Conclusions:

• The method of sperm preparation significantly influences sperm nuclear vacuolisation at 37°C.
• Temperature alone does not affect nuclear vacuolisation in motile sperm prepared by swim-up.