Beyonce Calls Miscarriage "The Saddest Thing I've Ever Been Through"

The 'Countdown' star reveals she had already picked out a name and penned a new song on her heartbreak.

Beyonce has opened up on her miscarriage for the first time during her forthcoming HBO documentary.

The 'Love On Top' singer describes the ordeal as the "saddest thing" she has ever had to go through.

"About two years ago, I was pregnant for the first time," she revealed in a preview for the show. "And I heard the heartbeat, which was the most beautiful music I ever heard in my life."

The Destiny's Child star continued: "I picked out names. I envisioned what my child would look like.. I was feeling very maternal."

The singer also speaks about the moment she first heard the news from the doctor upon a check-up visit to New York.

"I flew back to New York to get my check up - and no heartbeat," she revealed. "'Literally the week before I went to the doctor, everything was fine, but there was no heartbeat."

Beyonce also went on to speak about how she penned a new song based on the ordeal for her forthcoming new album.

"I went into the studio and wrote the saddest song I've ever written in my life," she added. "And it was the best form of therapy for me, because it was the saddest thing I've ever been through."

Beyonce and husband Jay-Z welcomed their first child back in January 2012 and the male rapper first spoke of the miscarriage in the song 'Glory', which he released shortly after the birth of Blue Ivy.

The HBO documentary Life Is But A Dream will premiere later this month shortly after she takes to the stage for the Super Bowl halftime show this Sunday (3rd February).