Yes, men have a biological clock too

By Theresa Larkin

When we talk about a biological clock ticking, it usually means the pressure women feel to fall pregnant before a certain age. It’s linked to the decline in eggs (ova) and fertility as females age.

But sperm numbers and fertility similarly decline with age in men. When a heterosexual couple experiences fertility issues, it’s equally likely due to male and female factors. Yet the woman is usually tested first.

A growing body of research highlights...