A breastfeeding senator has made Australian political history by becoming the first woman to nurse her newborn baby in the nation's parliament.

Greens' senator Larissa Waters returned to the upper house Senate for the first time Tuesday since giving birth to her second child, and brought her in for a feed during a vote.

Being able to breastfeed in the chamber follows new rules introduced last year to create a more a "family friendly" parliament in the wake of what has been described as a "baby boom" among politicians.

Under previous rules, children were technically banned.

"In 2003 Kirstie Marshall, a Victorian MP, was ejected from state parliament for breastfeeding her 11-day old baby girl," Waters added.

Breastfeeding in public

The issue has become a hot topic in many countries, and female lawmakers have been criticised for taking their babies to parliamentary sessions.

Last year, a politician in Iceland spoke in parliament while breastfeeding her baby daughter, and infants are allowed in the European and Spanish parliaments.

Labor frontbencher Katy Gallagher said the moment deserved to be acknowledged. "Women have been doing it in parliaments around the world... It is great to see it is able to occur now in the Senate," she told Sky News.

"Women are going to continue to have babies and if they want to do their job and be at work and look after their baby... the reality is we are going to have to accommodate that."

Source: Facebook

Waters has changed her Facebook profile to an image of herself breastfeeding in parliament, attracting dozens of mostly positive comments.