Like women, men's fertility also gradually decreases with age, especially after the age of 40. After this age, both the ...

When it comes to fertility, the focus tends to fall on women and their (loudly ticking) biological clocks. Yet it’s not just women who have to take age into account when considering when to have ...

Chart 1 shows age-specific fertility rates by five-year age groups in the United States since 1970. The total fertility rate is not able to capture these changes in age-specific fertility rates ...

It enrolled 446 men who presented to the university’s clinical andrology laboratory between January 2001 and March 2006 for semen analysis. Each individual provided two to eight ejaculates, for ...

About 11% of men of reproductive age in the U.S. experience some type of infertility, according to the U.S. Centers for Disease Control and Prevention.

Science Men Have Biological Clocks Too Recent research into “advanced paternal age” tells us a lot about the challenges faced by dads like Robert De Niro and Al Pacino.

In a 2021 study, for example, one in four men assumed male fertility would start to wane in their 50s, instead of their 30s. When Mr. Stephenson learned about his fertility issues, it came as a shock.

For example, “in the period between 2006 and 2010, one in four men in the United States was childless at age 40, compared to around one in seven women.” ...

Studies of men from around the world show that the length of the erect penis has grown 24% over the last 30 years. That sounds like it would be good news but it concerns some male fertility experts.

Yet female killifish show stronger decline in fertility with age than males. Despite the fact human females live longer than males, they tend to become infertile earlier than men, and go through ...

Yet it’s not just women who have to take age into account when considering when to have children. Experts agree that men's fertility also depends on their age.