Singapore: Doctors here have been seeing more cases of male infertility in recent years.

The increasingly older age of men at the time when they are trying for children is believed to be the main cause for this.

This Thursday's Mind Your Body explains how ageing can affect the quantity and quality of men's sperm, as well as the health of their offspring.

It also features Will To Fight, a new book penned by a psychiatrist here to help soldiers-to-be prepare themselves mentally for National Service.