Shanna Swan on the worldwide drop in fertility
A dramatic decline in sperm counts is occurring around the world — more than 50 percent over five decades. This means a man today likely has only half the number of sperm that his grandfather did. As one of the world’s leading environmental and reproductive epidemiologists, Shanna Swan has been sounding the alarm about the human infertility crisis for more than twenty-five years.
Tracy Frisch
Read Tracy Frisch’s full article about Shanna Swan, PhD’s research in The Sun Magazine.