The 41-year-old singer told Walters she used acupuncture combined with fertility treatments to conceive after suffering from a miscarriage.
“The main thing I did that was tough, was to go on progesterone like every month … and then when I was pregnant, I had to stay with the progesterone for 10 weeks,” Carey said. “It minimizes the chance of miscarriage by 50 percent.”
The couple now have six-month-old “little geniuses,” as Cannon calls them.
As for the allegations that Carey drank beer after giving birth to stimulate lactation, which led to a visit from a social worker, she said, “It just doesn’t make any sense. ... I didn’t even drink the beer.”
The full interview, which includes Roc and Roe’s TV debut, airs Friday on “20/20” at 10 p.m. Watch previews clips below.