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Fluorimetric Techniques for the Assessment of Sperm Membranes
Published on: November 28, 2018
Observation of sperm-head vacuoles and sperm morphology under light microscope
Yong-Seog Park1, Sol Park1, Duck Sung Ko1
1Laboratory of Reproductive Medicine, Cheil General Hospital and Women's Healthcare Center, Kwandong University College of Medicine, Seoul, Korea.
Objective:
The presence of sperm-head vacuoles has been suspected to be deleterious to the outcomes of assisted reproductive technology (ART). It is difficult to accurately distinguish morphologically abnormal sperm with vacuoles under a light microscope. This study was performed to analyze the result of the observation of sperm-head vacuoles using Papanicolaou staining under a light microscope and whether the male partner's age affects these vacuoles.
Methods:
Sperm morphology with vacuoles was evaluated using Papanicolaou staining and observed under a light microscope (400×) in 980 men. The normal morphology was divided into three categories (group A, <4% of normal morphology; group B, 4%-14% of normal morphology; and group C, >14% of normal morphology). The criteria for the sperm-head vacuoles were those given in the World Health Organization manual. For the analysis of the age factor, the participants were divided into the following groups: 26-30 years, 31-35 years, 36-40 years, 41-45 years, and 46-50 years.
Results:
The percentage of sperm-head vacuoles increased with normal sperm morphology (group A vs. groups B, C) (p<0.05). In the case of the age factor, a statistically significant difference was not observed across any of the age groups.
Conclusion:
A majority of the sperm-head vacuoles showed a statistically significant difference among normal morphology groups. Therefore, we should consider the probability of the percentage of sperm-head vacuoles not increasing with age but with abnormal sperm morphology. A further study is required to clarify the effect of the sperm-head vacuoles on ART outcomes.
Insights
Sperm-head vacuoles increase with abnormal sperm morphology, not male age. This finding is crucial for understanding assisted reproductive technology outcomes. Further research is needed.
Area of Science:
- Reproductive biology
- Andrology
- Assisted Reproductive Technology (ART)
Background:
- Sperm-head vacuoles are suspected to negatively impact ART success.
- Accurate microscopic identification of vacuolated sperm is challenging.
- Papanicolaou staining offers a potential method for evaluating sperm vacuoles.
Purpose of the Study:
- To analyze sperm-head vacuoles using Papanicolaou staining and light microscopy.
- To determine if male partner age influences the presence of sperm-head vacuoles.
- To investigate the relationship between sperm morphology and vacuole presence.
Main Methods:
- Sperm morphology and vacuoles were assessed in 980 men via Papanicolaou staining and light microscopy (400×).
- Sperm morphology was categorized into three groups based on normal morphology percentages (<4%, 4%-14%, >14%).
- Participants were grouped by age (26-50 years) to analyze age-related effects.
Main Results:
- A statistically significant increase in sperm-head vacuoles was observed with decreasing normal sperm morphology (Group A vs. Groups B, C; p<0.05).
- No significant correlation was found between male age and the percentage of sperm-head vacuoles across different age groups.
- The study highlights a link between abnormal sperm morphology and vacuole presence.
Conclusions:
- Sperm-head vacuole prevalence is significantly associated with abnormal sperm morphology, not male aging.
- These findings suggest that sperm vacuoles may be indicators of sperm quality independent of age.
- Further investigation is warranted to elucidate the precise impact of sperm-head vacuoles on ART outcomes.
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