Sexual Steroid Excess Can Lead To Low Sperm CountA study revealed that exposure to an excess of sexual steroids, like testosterone, during fetal development may be a potential risk factor for low sperm count and motility. Prenatal exposure to excess sexual steroids can occur in two ways, said Dr. Sergio Recabarren. First, the exposure may be a product of increased sexual steroids in the maternal environment due to a hormonal condition such as polycystic ovary syndrome. Second, humans are exposed to several industrial pollutants which can act as steroid mimics, causing the body to inhibit or accelerate native steroid production.

According to Dr. Recabarren, low sperm counts are also associated with testicular cancer, with an incidence rate of 20 fold higher than men with normal sperm analysis. The findings from this study highlight growing concerns of the detrimental effects of prenatal steroid excess on reduced sperm counts.