The insider added: “The focus will be very much humanitarian.
“The cameras will follow them as they visit compounds and share medical education.
“Meghan is particularly keen to share information about giving birth safely with the women she meets.
“And the plan is they will also help with building houses and resources.”
The news comes just a day after it was revealed Harry’s brother, Prince William, is to feature in his own documentary series, which will cover his charity work to help end homelessness.
A TV source told The Sun newspaper: “This is pretty extraordinary - it’s never been done before.
“Generally access to senior royals is very limited and totally controlled, but William clearly wants to change that.
“He’s keen to highlight his work, particularly on a homeless project which was a subject very close to his mother’s heart, and to connect with the public on a new level.
“He knows all too well how important it is that the monarchy develops a more modern relationship with the British people.
“TV is a great way to do that.”