Kate Middleton celebrates her 31st birthday Wednesday, but it’s likely to be a low-key celebration given her recent health issues related to her pregnancy.
St James's Palace said the Duchess of Cambridge would mark the occasion "privately", and she is understood to be with her husband, Prince William, at their home in north Wales.
Kate was treated last month for a severe form of pregnancy sickness known as hyperemesis gravidarum, whose symptoms include sustained bouts of nausea and vomiting.
The Duchess was admitted to a private hospital in London on December 3, which forced the palace to announce that she was in the very early stages of pregnancy.
Since being released from the hospital, Kate had kept a relatively low profile. She made her first public appearance since falling ill when she presented cyclist Bradley Wiggins with the main award at the prestigious BBC Sports Personality of the Year awards ceremony in London on December 16.
However, she’s not expected to travel on any royal tours aboard until 2014.
Meanwhile, the British government is currently pushing through a bill which will end the principle of male primogeniture, meaning William and Kate's first child will succeed to the throne, regardless of gender.