Men who do more physically demanding jobs involving heavy lifting are more likely to have higher sperm counts and testosterone levels, according to a new study published in the journal Human Reproduction. Researchers from Brigham and Women’s Hospital in Boston collected samples and survey data from more than 1,500 men and women, focusing on a subset of these participants, including 377…
Global Sperm Counts Declining at Accelerating Rate, New Meta-Analysis
A recently published meta-analysis shows that global sperm counts are declining worldwide—at an accelerating rate. The article, published in the journal Human Reproduction Update in November 2022 by an international team of researchers, reviewed 2936 scholarly abstracts and 868 full articles and analyzed data from 38 sperm count studies done on six continents, updating their…
Experimental ‘On Demand’ Male Birth Control Temporarily Immobilizes Sperm to Prevent Pregnancy
An experimental male birth control drug has been shown to temporarily paralyze sperm in mice and effectively prevent pregnancy for over two hours with full fertility returning after 24 hours. The effectiveness rate of the drug in mice clocked in at 100 percent. According to a Feb. 14 study published in the journal Nature, scientists experimented…
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