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.

Oprah Winfrey is back on Monday night and taking on a subject that impacts over half the population but doesn't nearly get enough attention: menopause.

“An Oprah Winfrey Special: The Menopause Revolution” aired on Monday, March 31 at 10 p.m. You can watch the series live as it airs on DIRECTV Stream (free trial) or Fubo (free trial). Here’s the information you’ll need to watch a free live stream of “An Oprah Winfrey Special: The Menopause Revolution” online without cable.