The white stuff

Male fertility is falling. The supply of sperm donors is drying up. In the nick of time, scientists have found that sperm can be grown from stem cells. But won't this make men redundant, asks William Leith.

Why giving birth is like a marathon

Paula Radcliffe believes motherhood will make her a better runner. Varicose veins, sleepless nights and pelvic-floor problems aside, she may well be right, says mother of three Lucy Atkins.

Watersports

Chic city lido or isolated river? Wakeboarding or a swim trek? Surfing or climbing a waterfall? The choice is yours. But whatever happens, says Chris Morley, come on in, the water's lovely.

Go forth and multiply

Britain is experiencing a dramatic slump in fertility. Sperm counts are falling; IVF clinics have queues round the block; and our chances of conceiving are being wrecked by drink, cigarettes and junk food. But all is not lost. Ian Sample weighs up the latest scientific evidence on how to get in shape for parenthood.

Is it all right to sunbathe when you’re pregnant?

Laura Barton: Sunbathing is foolish for anyone. For pregnant women, who have a higher body temperature, it is perhaps a smidgen more foolish: the sun will increase the core temperature of the mother, which will in turn increase the temperature of the foetus.