"ABC News" and "Good Morning America" correspondent Amy Robach has completed her final round of chemotherapy in a battle against breast cancer that began unexpectedly last October. The news journalist was participating in the first televised mammogram for "GMA" to raise awareness for testing when she received the unexpected news that she had cancer. 

"I'm 40 years old. I've never had a mammogram," she said. "I've avoided it. And I started thinking, 'Wow, if I've put it off, how many other people have put it off as well?'"

With the advice of her doctors, Robach immediately pursued aggressive surgery with a bilateral mastectomy - a decision that later turned out to have been wise. 

"While in surgery last week my surgeon found a second, undetected malignant tumor," she shared in a blog post last year. "No MRI, no mammogram, no sonogram had found it … it was only through the mastectomy that she discovered it. My cancer had spread to my sentinel lymph node, but not beyond."

Robach followed up the surgery with eight rounds of chemotherapy; the last of which she celebrated with "Good Morning America" yesterday. 

"This is my final treatment. The doctors say I graduate today. I decided to have most of my medical moments remain private, but this one I wanted to share," Robach said in a video. "This is a huge milestone for me and for anyone else who has battled cancer, and I join the ranks of 2.8 million U.S. women who are breast cancer survivors." 

Check out Amy's emotional video below. 

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Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

'GMA's' Amy Robach completes final chemo treatment
News correspondent discovered she had breast cancer after undergoing the first televised mammogram last October.