While Duchess of Cambridge is deeply touched by exercise tips offered by Prince Philip, Catherine Middleton may have suffered from miscarriage while Prince Williams was away.

Since her royal marriage in April, Kate Middleton has received worldwide attention and affection for her beauty as a fashion queen. On the other hand, she is under a great deal of pressure to conceive.

"If Kate is not pregnant within the next nine months, she'll be defying 200 years of British tradition," says Royal family biographer Andrew Morton.

Now rumors are circulating in the U.S. that Kate has suffered a miscarriage, which was sparked by a report from Globe magazine.

Kate's mother-in-law Camilla Parker-Bowles was reportedly overheard when she was telling friends that Kate is unable to conceive because of health problems.

"Health complications from Kate's adolescence raised red flags that may have an impact on her ability to conceive," sources said.

"Catherine

Catherine Middleton (REUTERS/POOL New)

British monarchy tradition pressures Kate to give birth within a year of marriage, just as the Queen gave birth to Prince Charles exactly a year after her wedding to Prince Phillip, and Princess Diana gave birth to Prince William 11 months after her wedding to Prince Charles.

Whether the rumored miscarriage is true or not, pressure for the Royal bride to start a family continues to mount as doctors think she is too thin to conceive.

Meanwhile, Kate was comforted by her grandfather- in-law Prince Philip, who has been offering her tips from exercising to decorating the kitchen of her new flat in Kensington Palace with Prince William, the UK Sun reported.

"Kate is really touched. It's a sign that senior royals are keen to make sure new members fit in," a source said. "Prince Philip wanted to make sure the pressures weren't getting to her. He's even been sharing tips about his exercise routine with Kate. He is 90, but still tries to keep fit."

"Britain's

Britain's Prince William and Catherine, Duchess of Cambridge, walk after their wedding ceremony in Westminster Abbey in central London (REUTERS/Toby Melville)