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Dad’s Environmental Exposure, Reproductive Success Posted: 11 Jun 2014 12:11 PM PDT A new study, among the first in humans, is underway to investigate whether phthalate (plastics) levels in expectant fathers have an effect on the couples' reproductive success, via epigenetic modifications of sperm DNA. Phthalates are detectable in nearly 100 percent of the U.S. population, and phthalate exposure, known to disrupt endocrines, is associated in human studies with changes in semen quality, androgen levels, birth outcomes and offspring neurodevelopment, but a mechanism has not been clearly identified.

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