Letter regarding use of laptop computers connected to internet through Wi-Fi decreases human sperm motility and increases sperm DNA fragmentation.

3 02 2012

To the Editor:

We read with great interest the article by Avendaño et al (1), “Use of laptop computers connected to internet through Wi-Fi decreases human sperm motility and increases sperm DNA fragmentation.” We want to congratulate the authors for their original and interesting work. However, this study has also raised a few questions.

First of all, the issue of sperm analysis method should be addressed. Indeed, sperm analysis was performed manually before selection, after swim up, and after 4 hours of incubation under the computer or not (control group). Despite efforts towards improvement and standardization of laboratory procedures (2), manual sperm analysis still suffers from a lack of precision and accuracy (3), particularly when counting progressive motile spermatozoa in an enriched supernatant. Moreover, sperm analysis was conducted here by a single observer and apparently not repeated, which leads to a high risk of intra observer variability. We also would like the authors to precise if the study was operator-blinded or if the operator was aware of the origin of the samples he was assessing. All these limitations could constitute a bias and prevent from relevant interpretation of the results. Could the authors consider automated sperm analysis as a reliable alternative in order to improve reproducibility and precision of their results? (4) Moreover, CASA could bring new insights into a potential WiFi-induced sperm motility alteration and kinetics modification. Read the rest of this entry »

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Re: Use of laptop computers connected to internet through Wi-Fi decreases human sperm motility and increases sperm DNA fragmentation

12 01 2012

To the Editor:

We read with interest the article “Use of laptop computers connected to internet through Wi-Fi decreases human sperm motility and increases sperm DNA fragmentation” by Avendano et al.(1). However, we do actually think that the evidence presented in this paper cannot support the claim that the observed effects are nonthermal and caused by exposure to a Wi-Fi radiofrequency electromagnetic field.

Keeping constant the temperature under the computer by an air conditioning system is not sufficient to ensure homogeneity of the temperatures within the experimental area, since the heat source from the laptop is not homogenous itself, and to exclude that there is no local variation in the samples temperatures. Read the rest of this entry »





Usefulness Of Pentoxifylline To Improve Semen Quality

2 03 2010

To the Editor:

We read with great interest the article published by Oliva et. al. (1), as our main purpose is to improve semen quality of patients attending our Male Fertility Laboratory where the prevalence of varicocele is high. Read the rest of this entry »