A new study out of Stanford has found that while, over the last 30 years, cisgender men’s sperm counts and testosterone levels have decreased, their penises have gotten longer, reports the Advocate.
Michael Eisenberg, a medical doctor and professor of urology at Stanford Medical School, is concerned about declining sperm quality and testosterone level trends in male reproductive health data. The finding made him explore whether any other differences in men’s reproductive health are cause for alarm, according to Stanford’s Scope blog.
Researchers compiled data from 75 studies reporting penile lengths for 55,761 men between 1942 and 2021 for a study published on February 14 in The World Journal of Men’s Health.
They observed a 24 percent increase in the average erect penis length over 29 years.
Read more here to see what researchers believe may be the cause of this phenomenon.
