Perfluorochemicals and human semen quality: the LIFE study

Area of Science:

• Environmental health
• Reproductive toxicology
• Human biomonitoring

Background:

• Limited data exist on persistent environmental chemicals and male semen quality in general populations.
• Perfluorinated chemicals (PFCs) are widespread environmental contaminants.
• Understanding PFCs' impact on male reproductive health is crucial.

Purpose of the Study:

• To examine the association between serum concentrations of seven PFCs and semen quality parameters.
• To investigate these relationships in a population-based sample of men planning pregnancy.

Main Methods:

• Recruited 501 couples from two U.S. regions (2005-2009).
• Measured seven serum PFCs using tandem mass spectrometry.
• Analyzed semen quality parameters from paired samples using linear regression, adjusting for confounders.

Main Results:

• Six PFCs (Me-PFOSA-AcOH, PFDeA, PFNA, PFOSA, PFOS, PFOA) were associated with 17 semen quality end points.
• Perfluorooctane sulfonamide (PFOSA) linked to smaller sperm head size, lower DNA stainability, and higher immature sperm percentages.
• Other PFCs (PFDeA, PFNA, PFOA, PFOS) associated with reduced sperm tail coiling.

Conclusions:

• Specific perfluorinated chemicals are associated with certain semen quality parameters in men.
• Perfluorooctane sulfonamide (PFOSA) showed the most significant associations, though results varied.
• Findings highlight potential reproductive health concerns related to environmental PFC exposure.