It's a celebrity trend that’s seen as empowering, leaving no room for doubt a baby is on the way.

Singers Rihanna and Beyonce and actresses Margot Robbie and Sienna Miller have all showcased their growing bumps in revealing dresses, cropped tops and low- slung skirts.

But a study suggests that when ordinary women dare to bare in a similar fashion, they are more likely to be dehumanised and objectified – even in healthcare settings.

The US scientists said flaunting a pregnant belly could have ‘unintended consequences’ for women who copy the trend.

They compared the experiences of Rihanna, as a famous black woman, to two unknown white women. The singer, who is expecting her third child, has glided through her pregnancies in a series of skimpy outfits.