Fertility experts say new evidence pointing to the relationship between a healthy lifestyle and fertility is good news for couples.

Scientists, doctors and researchers involved in reproductive medicine are gathering in Adelaide for the Fertility Society of Australia's four-day conference.

The conference chairman, Doctor Jeremy Thompson, says one in six Australian couples experiences infertility, but the influence of fitness and good nutrition could help turn that around.

"A healthy lifestyle is being promoted as a way of attempting infertility treatment as a first case option," he said.

"This is good because it is obviously very low impact if you can modify your lifestyle and may allow people to get pregnant without requiring significant amounts of manipulative treatment."

Dr Thompson says new research backs the theory.

"We're becoming more and more aware that health and lifestyle impacts on reproduction and reproductive activity, so that infertility can be attributed to lifestyles that peoples choose," he said.

"Unhealthy lifestyles can actually be associated with increased infertility."