The fewer siblings children have, the happier they are, a survey has suggested.

NZ women have been warned to take care with painkillers during pregnancy, after a study found a link to potential fertility problems in baby boys.

An Otago University molecular biologist has been awarded New Zealand's top science and technology honour, the 2010 Rutherford Medal.

A 57-year-old woman is believed to have become Australia's oldest mother after giving birth to twins last week.

The body's immune defences can destroy the common cold virus after it has invaded the inner sanctum of a human cell, scientists have found.

Hal Herzog, one of America's foremost psychologists, is dedicated to understanding our often contradictory behaviour towards different species.

Those intense over-powering feelings of being truly, madly, deeply in love are the result of complex and rapid brain activity.

Former long-distance running star Allison Roe has defended thermal imaging, a popular but controversial investigation for breast cancer.

Health authorities are warning women against thermal imaging for breast cancer detection and one expert even says the industry should be shut down.

Researchers found people who were more introspective tended to have larger volumes of nerve tissue in an area of the prefrontal cortex.

Falling in love comes at a cost that does not include flowers or bar bills, a new study has found.

Garth George writes that an expanded screening programme for Down Syndrome may go against the rights of the disabled.

Scientists have identified a diet that works even better than a fruit and vegetable eating plan to cut the risk of heart attacks.

Scientists have found the first inherited link to common migraine and a possible reason for extreme headaches.

Dita De Boni on why she supports calls to allow IVF egg donors to be paid.

New Zealand fertility experts are asking whether money could be offered to encourage men and women to donate sperm and eggs for childless couples.