'Cat Ladies' and Declining Birth Rates: Is There a Link?
Briefly

The article discusses the potential link between Toxoplasma gondii infection, transmitted through cats, and male infertility. While animal studies indicate reproductive harm from this parasite, robust human studies are lacking. It urges caution regarding Toxoplasma exposure, particularly for men. The parasite’s lifecycle involves ingestion of oocysts via contaminated environments or undercooked meat, and while it usually remains dormant, the implications for reproductive health prompt advisories on safe food handling and hygiene, especially for pet owners dealing with cat litter.
Animal studies consistently show reproductive damage across species from Toxoplasma infection, raising important questions about its potential impact on human male infertility.
Despite consistent findings in animal studies, no large, high-quality research in humans has confirmed that Toxoplasma infection definitively leads to male infertility.
Read at Psychology Today
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