In fact the mother-to-be already has a gift lined up for her future child, if it's a girl, which she purchased before she had even met Prince Harry.
In an interview back in 2015, almost a year before she began dating her now husband, the then actress revealed the heirloom piece she plans to give to her daughter.
Speaking to Hello! magazine she said: 'I’ve always coveted the Cartier French Tank watch - I totally splurged and bought the two-tone version.
'I had it engraved on the back, “To M.M. From M.M.” and I plan to give it to my daughter one day.
'That’s what makes pieces special, the connection you have to them.'
The classic wristwear retails at almost £5,000 and the engraving is thought to stand for 'to Meghan Markle from Meghan Markle' as it was a gift to herself to celebrate the third season of Suits.
However, the message could well influence the couple's name choice if they do have a little girl as she would inherit the timepiece, and so they could opt with a moniker beginning with M to reflect the engraving.
It is not yet known whether the couple are expecting a boy or a girl and the public are unlikely to find out until its birth next Spring.