In an article for the New York Times, Meghan wrote about losing her unborn baby in July while she and husband Harry were living in Los Angeles.
The duchess began her article by describing a typical morning getting up and looking after her son Archie: "After changing his diaper, I felt a sharp cramp.
"I dropped to the floor with him in my arms, humming a lullaby to keep us both calm, the cheerful tune a stark contrast to my sense that something was not right.
"I knew, as I clutched my firstborn child, that I was losing my second.
"Hours later, I lay in a hospital bed, holding my husband's hand. I felt the clamminess of his palm and kissed his knuckles, wet from both our tears.
"Staring at the cold white walls, my eyes glazed over. I tried to imagine how we'd heal."
Meghan Markle and Prince Harry have one child together, Archie, who was born in 2019.
In 2020, they stepped down as senior members of the royal family.