Singing legend Elton John has vowed to boycott fashion label Dolce & Gabbana after the designers slammed same gender families.

The singer posted a photograph of Domenico Dolce and Stefano Gabbana on Instagram and branded them "judgemental" and "archaic" after they were interviewed in Italy’s Panorama magazine, reports mirror.co.uk.

"We oppose gay adoptions," they told the publication. "The only family is the traditional one.

"No chemical offsprings and rented uterus: life has a natural flow, there are things that should not be changed."

Dolce said that creating children "must be an act of love", adding: "You are born to a mother and a father – or at least that’s how it should be.

"I call children of chemistry, synthetic children. Uteri (for) rent, semen chosen from a catalog."

Gabbana then said: "The family is not a fad. In it there is a supernatural sense of belonging."

The "Your song" hitmaker has sons Zachary, 4, and Elijah, 2, with husband David Furnish, who were born to the same surrogate mother in Calfornia in 2010 and 2013.

John wrote a post: "How dare you refer to my beautiful children as ‘synthetic’.

"And shame on you for wagging your judgemental little fingers at IVF – a miracle that has allowed legions of loving people, both straight and gay, to fulfil their dream of having children.

"Your archaic thinking is out of step with the times, just like your fashions. I shall never wear Dolce and Gabbana ever again. #BoycottDolceGabbana."