Meghan Markle and Prince Harry, 34, revealed they were expecting their first child together back in October this year.
The announcement, made by Kensington Palace, revealed that the latest royal was due to be born in the spring of 2019.
The season officially starts on March 20, and ends on June 21.
However, other than it being spring, the exact time of year that the 37-year-old is expected to have the youngster remains unconfirmed.
But, one expert in hair has spotted something which could hint at when the exciting time may actually be.
She divulged: “In a number of recent images of Meghan, her hair certainly appears much fuller than before pregnancy and it’s possible that this is due to changing hormone levels.
“The increased levels of hormones during pregnancy can cause the growth cycle of the hair to increase, meaning the hair is less frequently renewed and replaced at the site of the follicle and women will experience thicker and shiner hair.”
Jane went on to explain that many pregnant women find the volume of their hair increases around three thirds of the way into pregnancy.
She said: “I tend to find that most women will experience some level of increased volume by around the six month mark.”
Crunching the numbers, that would mean that it may be towards the March side of spring that the tot arrives.
However, there could be other reasons for Meghan’s especially luscious locks at this stage of her pregnancy.
According to Jane, this could be because she may have changed the type of products she is putting on her hair – in an effort to protect her unborn baby.
The hair expert explained: “Hair normally grows at a rate of around 1cm each month and marginally faster during pregnancy. However the most significant change that pregnant women will experience will be in volume due to the change in growth cycle and reduced hair fall.
“There are, of course, other possibilities to consider. It is highly likely that Meghan may also be avoiding putting harsh chemicals in her hair.
“From experience, I find that lots of pregnant women and celebrities, particularly those who are very health conscious, will avoid using dye or chemicals in their hair in case it has negative effects on the unborn baby.
“She may also be eating more calories, healthy foods and increasing her intake in iron which can help to promote hair growth. The folic acid that many expectant mothers take before they fall pregnant can also help to improve and stabilise hair growth patterns.
“It’s important to remember that simply using certain products can enhance the volume of hair significantly!”
Ahead of her marriage to Prince Harry, Meghan revealed her go-to breakfast option.
Speaking to the website EyeSwoon in April 2015, the now-retired actress explained that she would typically enjoy an “açaí bowl, clean cleanse shake, or a green juice”.
Who is Meghan Markle? Quick profile
Meghan Markle was born Rachel Meghan Markle, on August 4, 1981 to parents Doria Ragland and father Thomas Markle.
Her father was previously married to Roslyn Loveless and Meghan has two elder half sibling – sister Samantha Markle and brother Thomas Markle Junior.
Meghan’s first television appearance in the USA was in an episode of the medical drama General Hospital in 2002.
She later moved on to roles in CSI, Without a Trace and Castle along with bit parts in Hollywood films including Get Him to the Greek, Remember Me and Horrible Bosses.
Meghan was also a “briefcase girl” on Deal or No Deal – but her most famous role was as Rachel Zane in legal drama Suits, which launched in 2011.
She was written out in the finale of the seventh series when her character got married, which aired in April 2018 – just before she got married herself.
Charity and humanitarian work
Meghan Markle’s career in television has gone hand-in-hand with her support for causes close to her heart.
She wrote about the stigma around menstrual health in an article for Time magazine and was a Global Ambassador for World Vision Canada – with whom she travelled to Rwanda for the charity’s Clean Water Campaign.
And her commitment to gender equality has seen her work with the United Nations – receiving a standing ovation in 2015 for her speech to mark International Women’s Day.
In September 2011, she wed film producer Trevor Engelson, who she began dating in 2004.
But the pair divorced two years later in August 2013, citing irreconcilable difference.
She was in a relationship with celebrity chef Cory Vitiello for almost two years, before they broke it off in 2016 but the two remain good friends.
And in June 2016, she met Prince Harry on a blind date set up by a mutual friend.
Their relationship began in October that year and just over one year later, on November 27, 2017, the pair announced their engagement.
They married on May 19, 2018 at St George’s Chapel in Windsor Castle.
Some have claimed Meghan Markle is the first mixed-race member of the Royal Family.
Historians are still arguing about Queen Charlotte, the wife of King George III.
But Meghan will be the first royal to openly embrace a mixed-race heritage.
She has written about the difficulties of being a biracial actress in Hollywood as she claims she is not black enough for some roles and not white enough for others.