Biggest Meghan Markle continues her pregnancy

It has been widely reported that Meghan Markle was 12 weeks pregnant, but a social media mistake dating earlier this week seems to have revealed her true date of birth.

On Tuesday, the Duke and Duchess of Sussex attended an afternoon reception at Admiralty House.

During the event, Meghan was photographed chatting with Missy Higgins, adoring little nine-week-old Luna, the singer, reports news.com.au.

Later in the day, Higgins shared a post on Instagram about her meeting with Meghan, detailing their conversation and congratulating the Duchess for addressing a day of commitments while she was four months pregnant .

Higgins' message about her conversation with Meghan seems to reveal her true due date, contradicting reports from many media that Meghan is three months pregnant and has just undergone a 12-week scan.

But if Meghan was even more advanced in her pregnancy, that would also explain why she was able to easily manage such a busy tour schedule (apart from a few secret breaks).

Many pregnant women still have morning sickness between 12 and 14 weeks, which means that a full day of engagement would have been difficult for Meghan if she still had symptoms.

The Kensington Palace confirmed Monday that Meghan and Harry were expecting their first child in the British spring, which runs from March 20 to June 21.

After weeks of speculation about Meghan's pregnancy, the Duchess of Sussex was wearing a loose coat at Eugenie's wedding and was holding a purple back to her belly when she arrived in Sydney on Monday.