Anti-radiation clothing, one of the must-haves for pregnant women in China, could be doing more harm than good, scientists have warned.

Such products came on to the market in the late 1990s and have now grown so dominant most mothers-to-be believe they are essential. They are convinced the garments are "effective" in blocking electromagnetic waves from the multiple electronic devices around them, especially from computers.

But along with the booming sales have been arguments from scientists who say that the clothing has no benefit.