Kate Middleton
Kate Middleton has reportedly returned to her family home in Bucklebury, Berkshire, with her son, Prince George.Reuters

Kate Middleton has reportedly returned to her family home in Bucklebury, Berkshire, with Prince George, as she continues to struggle with her antenatal sickness.

According to a report in Daily Mail, the Duchess of Cambridge, who is pregnant with her second child, has been suffering from a severe form of morning sickness - hyperemesis gravidarum - and "hasn't been at all well."

Adding on, the sources said that her forthcoming engagements, until at least the week after next, have been cancelled.

"Kate is feeling so lousy that she just wanted to be with her family and out of public view," a source said.

"She is extremely close to Carole, who is very much a hands-on grandmother. Between her and their nanny, Maria [Borallo], Kate has all the help she needs with George while she is feeling so sick.

"And Bucklebury is somewhere she can just relax and be herself," the insider added.

On 21 October, Kate and Prince William will welcome Singaporean President Tony Tan to Britain, Buckingham Palace has confirmed.

When Kate was pregnant with Prince George, she was hospitalised with acute morning sickness at the King Edward VII Hospital.

She gave birth to Prince George at the St Mary's Hospital, London, on 22 July.