"It's so very, very sad," Charles, the 9th Earl Spencer said

Prince Harry's uncle Charles Spencer says that his thoughts are with Meghan Markle after she revealed that she lost a baby earlier this year.

Meghan, 39, wrote in the New York Times on Wednesday that she suffered a miscarriage in July, saying, "I knew, as I clutched my firstborn child, that I was losing my second."

During an appearance on the British talk show Lorraine on Wednesday morning, the brother of Harry's late mom Princess Diana said, “It is, Lorraine [terribly sad]. I can’t imagine the agony for any couple of losing a child in this way."

Charles, the 9th Earl Spencer, added, "It's so very, very sad. And of course, I totally agree with you, all thoughts with them today.”

Meghan Markle Prince Harry Duke Duchess Sussex
Prince Harry and Meghan Markle

The couple informed both their families about their heartbreaking news, a source confirms to PEOPLE.

"There is a lot of sadness around the family," a royal source tells PEOPLE.

Stressing that it is an intensely private matter, a spokesman for Harry's father Prince Charles declined to comment, while separately at Buckingham Palace, a spokesperson concurred, saying it was a deeply personal matter.

A second royal source added there is "understandable sadness" in the family.

Archie Meghan Markle Prince Harry Duke Duchess Sussex
Archie, Meghan Markle and Prince Harry

Just last month, Meghan and Harry's sister-in-law Kate Middleton made a surprise outing to meet with families and hear about research work into miscarriage, stillbirth and premature birth with the charity Tommy's. The organization praised the Duchess of Sussex for opening up about her personal experience — as well as the impact that miscarriages have on fathers and partners.

"Meghan Markle, the Duchess of Sussex has written a piece for the New York Times, #breakingthesilence on miscarriage and the importance of including dads and partners in the healing process," they wrote on Twitter, linking to a support page for partners. "Thank you Meghan, for #breakingthesilence."

Midwife Sophie King, who works with Tommy’s, said in a statement: "Baby loss at any stage in pregnancy is one of the most heart-breaking things a family can experience – and as Meghan Markle said, it’s experienced by many but talked about by few. 1 in 4 pregnancies ends in loss, but it’s a real taboo in society, so mothers like Meghan sharing their stories is a vital step in breaking down that stigma and shame.

"Meghan’s essay praises the bravery of parents who share their stories, and those who prefer to grieve privately can still find comfort and connection in reading about others’ experiences," King added. "Her honesty and openness today send a powerful message to anyone who loses a baby: this may feel incredibly lonely, but you are not alone. Friends and family, doctors and midwives, all of us at support organisations like Tommy’s; we’re here."

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In her searingly honest and heartbreaking account, Meghan revealed that she suffered the miscarriage – which would have been a sibling to 1-year-old son, Archie — in July of this year.

“I knew, as I clutched my firstborn child, that I was losing my second,” Meghan, 39, wrote in the Times essay.

“Losing a child means carrying an almost unbearable grief, experienced by many but talked about by few,” Meghan added, recounting how she and her husband, 36, shared tears later as they comforted each other in a hospital bed.