Winfrey, 71, said that in addition to a loss of concentration, she also suffered from heart palpitations -- a sensation of a racing or irregular heartbeat -- which she said she did not know were a symptom of menopause, the time in life when a woman's periods stop permanently.

“An Oprah Winfrey Special: The Menopause Revolution” airs Monday, March 31 at 10 p.m. ET on ABC. Stream the special as it airs with Fubo, DirecTV Stream, and Hulu + Live TV subscriptions; or watch the next day on Disney+ and Hulu.

Oprah Winfrey is breaking the silence on menopause with her new Hulu special, “An Oprah Winfrey Special: The Menopause Revolution,” aiming to support women by sharing her own challenging experiences.