Molybdenum Exposure and Semen Quality: Meeker et al. Respond

Cadmium, Lead, and Other Metals in Relation to Semen Quality: Human Evidence for Molybdenum as a Male Reproductive Toxicant

BACKGROUND Evidence on human semen quality as it relates to exposure to various metals, both essential (e.g., zinc, copper) and nonessential (e.g., cadmium, lead), is inconsistent. Most studies to date used small sample sizes and were unable to account for important covariates. OBJECTIVES Our goal in this study was to assess relationships between exposure to multiple metals at environmental l...

Re: "Caffeine intake and semen quality in a population of 2,554 young Danish men".

We read with interest the article by Jensen et al. (1) on the association between semen quality and caffeine intake among 2,554 young Danish men. They found a high intake of cola and/or caffeine products to be associated with reduced sperm concentration and total sperm count, but the association was statistically significant only for cola. Jensen et al. (1) cited a previous study conducted by o...

Molybdenum Exposure and Semen Quality: How Robust Is the Evidence of an Effect?

Is dietary pesticide exposure related to semen quality? Positive evidence from men attending a fertility clinic.

Chiu and her colleagues from Harvard School of Public Health and Massachusetts General Hospital present important new data on semen quality in relation to dietary pesticide exposure via fruit and vegetable intake (Chiu et al., 2015). To examine this relationship the authors utilized a novel approach that classifies fruits and vegetables into high versus low-to-moderate pesticide residue groups ...

I-7: Fatty Acids and Male Reproductive Function

Background Background: The fatty acid composition of the sperm membrane changes drastically during spermatogenesis and may be key to its function. Previous data has shown that intake of long chain poly-unsaturated fatty acids can change the fatty acid composition of tissues, including testes and sperm. However, whether these changes in composition translate into changes in semen quality or male...