Celebrity stylist Lalla Bronshtein, designer at eco fashion label, LallaXRR told Express.co.uk Kate has been wearing more loose fitting dresses.
She said: “In recent photos of Kate, her dresses have a more loose, comfortable feel to them.
“The peasant style dresses in particular flow beautifully, while others have a more of an Empire line.
“Although whether she is pregnant or not is anyone’s guess but during previous pregnancies, she wore a similar style to these.”
It has been claimed Prince William and Kate are talking “seriously” about having a fourth child.
A source claimed the couple discussed the idea on a recent holiday in Turro.
They told New Idea: “Kate and William got to enjoy plenty of one-on-one time, too, and they had some intimate, romantic evenings all by themselves.
“It also gave them the chance to regroup and map out the rest of their summer, so they could organise their schedule around the next big priority – baby making!”
Kate’s body language could provide a huge indication of a pregnancy.
An expert has told Express.co.uk the time is right to announce another baby.
Body language expert Judi James said: “After the grim year the royal firm have had a new royal baby might be just the tonic they and the nation need.
“Prince William and Kate have worked hard to fill the gap left by the Sussexes and a new baby would establish a sense of continuity and moving forward.”