Since announcing her pregnancy last November, Harlow has continued to work. She even stayed up late last month to see Biz Markie perform at the launch party for CNN original series "The Eighties."
See more photos of Poppy Harlow through the years:
Poppy Harlow CNN
CNN's Poppy Harlow welcomes a baby girl
Poppy Harlow during Revlon Launches 'Flair' Fragrance Cocktail Party at Mr. Chow in New York City, New York, United States. (Photo by Dimitrios Kambouris/WireImage for BWR Public Relations)
Poppy Harlow during Adrian Grenier and Jessica Stam Host a Charity Ball to Benefit African Well Projects at Metropolitan Pavilion in New York City, New York, United States. (Photo by Shane Gritzinger/FilmMagic)
NEW YORK, NY - MAY 19: CNN's Poppy Harlow attends the opening of the Milly Madison Avenue boutique on May 19, 2011 in New York City. (Photo by Thomas Concordia/Getty Images)
NEW YORK, NY - MAY 19: Michelle Smith and Poppy Harlow attend the opening of the Milly Madison Avenue boutique on May 19, 2011 in New York City. (Photo by Thomas Concordia/Getty Images)
BEVERLY HILLS, CA - MAY 24: Journalist Poppy Harlow attends the 36th annual Gracie Awards gala at The Beverly Hilton Hotel on May 24, 2011 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - NOVEMBER 14: Poppy Harlow and Matt Blank attend a private reception & screening of Showtime's Homeland on November 14, 2013 in New York City. (Photo by Michael Loccisano/Getty Images for Showtime)
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Harlow famously passed out on air last year but didn't miss a beat once she was cleared to continue working. She hasn't decided when to return from maternity leave at this point, but Harlow's previous actions suggest she'll be back sooner than later.
Sinisa & I are thrilled to welcome our daughter Sienna into the world! 8.5 pounds and she is a bundle of joy! pic.twitter.com/dC5iQs2BLq