Britain's Royal Family Britain's Kate Middleton, the Duchess of Cambridge (R), stands with her husband Prince William, as she holds her son Prince George before they depart Canberra April 25. Photo: REUTERS

The pregnancy rumors just keep coming. Following last week’s report that the Duchess of Cambridge, Kate Middleton, is expecting twin girls, another tabloid is now claiming the royal is expecting just one child of an unknown gender with Britain’s Prince William, 31.

According to a report in Life & Style, Middleton, 32, is staying out of the public eye due to medical issues related to her alleged second pregnancy. While Clarence House has yet to confirm or deny Middleton is expecting again, insiders are speculating the duchess could be suffering from another bout of Hyperemesis Gravidarum, the same acute form of morning sickness she battled while pregnant with Prince George, now 10 months, in 2012.

“She is so tired at the end of the day, she collapses on her bed,” an unidentified “royal source” told the magazine. “She is way beyond exhausted. It’s a particularly worrying time for William. He is very concerned.”

Despite Middleton’s healthy appearance during her last photograph on the final day of her Australia/New Zealand tour April 25, insiders claim the royal's recent weight loss is evident to those around her. “One source says people who saw Kate recently report her weight has plummeted,” reads the report, with one fitness expert claiming that Middleton’s 5-foot- 10-inch frame is unhealthy for her current weight, estimated at 98 pounds.

Kate Middleton Kate Middleton, The Duchess of Cambridge, shows off her baby bump at Westminster Abbey June 4, 2013. Photo: REUTERS

While Middleton, who gave birth to the couple's first child, Prince George, in July, is allegedly "shockingly" underweight this pregnancy, insiders claim the duchess is more concerned about her condition affecting those around her. “She doesn’t want to let anyone down,” said a source. In spite of Middleton’s concerns, William is reportedly persistent in keeping his wife of three years “healthy and happy” while awaiting the arrival of their second child. “They adore being parents and are eager to get on with adding to their family. They’re ready,” said a source.

In contrast to last week’s OK! report that claimed Middleton was expecting twin girls, Life & Style is reporting that Middleton and William are unaware of their unborn child’s gender and have plans to keep the child’s sex a surprise until the birth.

William last addressed the pregnancy allegations during a St. Patrick’s Day celebration in Aldershot, England, in March. After being prompted by a soldier to confirm or deny if the duo would be expanding their family soon, the royal reportedly responded by quipping, “One’s enough at the moment.”