'The girl is too thin' - Feminist Germaine Greer on Kate Middleton

Germaine Greer, left, says Catherine, The Duchess of Cambridge is 'too thin'. Photos / Getty Images

The Duchess of Cambridge may already be pregnant with her second child and plans to add another baby to the royal brood but one controversial feminist has slammed her decision, saying she's "too thin" and should stop.

Germaine Greer, who penned best-selling book The Female Eunuch in 1970, said the Duchess of Cambridge who gave birth to Prince George last July, is "too thin" and shouldn't have any more children.

Speaking to British-based magazine Newsweek Europe about Kate's chronic morning sickness, hyperemesis gravidarum, the 75-year-old Australian said: "The girl is too thin [Kate] is vomiting her guts up and shouldn't have been made to go through all this again so soon.

"It's not so much that she has to be a womb, but she has to be a mother. I would hope after this one she says, "That's it. No more".

Hyperemesis gravidarum affects only two per cent of pregnant women. The sickness is so severe that sufferers end up dehydrated and weak.

This often results in hospital admission - as it did when Kate was carrying her first child - for intravenous fluids and heavy-duty anti-sickness drugs.

If that wasn't enough, Greer added that 32-year-old Kate had a "b*****d of a job" because she had been "put in charge of William".

She believes that Kate's interests have been limited by the royal family, which she dismisses as a "mad anachronism", and argues that Kate has had to learn exactly how to behave, adding that spontaneity will get her in trouble.

She also states that Kate, who graduated from St Andrews University with a 2.1 honours degree in art history in 2005, is a great deal more intelligent than the rest of the royals yet is "made to appear absolutely anodyne".

Greer, a theorist, academic and journalist, is widely regarded as one of the mid-twentieth century's most controversial feminist voices.

She has penned numerous tomes, including Sex and Destiny: The Politics of Human Fertility (1984); The Change: Women, Ageing and the Menopause (1991) and The Whole Woman (1999).

She once defined her goal as "women's liberation" as distinct from "equality with men" and aims to promote the freedom of women to define their own values and determine their own fate.

Republican Greer actually met the Queen - and famously curtseyed - during a visit to Buckingham Palace in 2006.

The Queen was hosting a reception for Australians ahead of her royal tour, when she opened the Commonwealth Games in Melbourne.

- Daily Mail