Danielle Fishel from 'Boy Meets World' opens up about baby's health

The ‘90s sitcom actress talks about her newborn son’s potentially deadly lung disorder and the guilt she felt in an emotional essay.
3:56 | 10/14/19

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Transcript for Danielle Fishel from 'Boy Meets World' opens up about baby's health
story, "Boy meets world" star Danielle Fishel opening up about her newborn son's first few weeks of life born with a potentially lung disorder. Kayna Whitworth sat down with her for a "Gma" exclusive. Kayna joins us from Los Angeles. Good morning, kayna. Reporter: Hey, Amy, good morning. So Fishel told me she had a perfectly healthy pregnancy and her water broke early and an ultrasound revealed water in her son's lungs. What played out next was a three-week ordeal in the NICU and birth story unlike anything she had imagined. Actress, producer and director, Danielle Fishel best known as topanga on the hit show "Boy meets world." No matter how difficult life gets, the important thing is to live it with hope. Reporter: Now a new mom. The 38-year-old and her husband welcoming their baby boy Adler in June nearly a month early. It never occurred to me that because my water broke so early that something else could be going on. Reporter: Their tiny bundle of joy entered the world fighting for his life. Ultrasound tech came and he said, okay, it's fluid in the lungs. Reporter: Adler diagnosed with a rare lung disorder, chylothorax, affecting less than 1% of babies with fluid building up in his lungs, it makes breathing extremely difficult and could be fatal. He would spend the next 11 days in the NICU. As a parent you feel kind of helpless. Reporter: Doctors hoping his lymphatic system would heal itself on small dozes of breast milk and specialized formula through a feeding tube. Every three hours, I would wake up and then do the feeding with him. That's not how you imagined No, not at all. Reporter: They thought they were taking their son home but an ultrasound revealed the fluid in his lungs had tripled. Adler rushed to the children's hospital in an ambulance. It just felt like how, how is this possible? Reporter: He remained in the hospital for another ten days. He wasn't able to have breast milk because they think that that was causing fluid buildup. Yes, I wanted to breath feed so badly and it was a very emotional experience to feel like this very natural thing that I'm supposed to be able to feed my baby is actually partially what's harming him. Reporter: Finally after three weeks they took their baby boy home. The family of three quickly settling in. There wasn't anything that didn't feel like the most beautiful, most amazing, most special because even if it was, well, I haven't slept at all, it was, but we're home. He's home. Reporter: While they enjoyed those special moments at home, Fishel says she's always thinking about other parents currently experiencing heartbreak in the NICU. We were one of the luckier families there. You'll never forget the faces of parents who are in that situation and are really, really struggling. What do you want to say to those familys? First of all you're incredibly strong and you are doing an amazing job and my prayer and my hope for you is that there is light at the end of the tunnel. Reporter: Fishel found her light in Adler. I will always be able to tell him you've already done hard things. You did one of the hardest things ever when you were first born and so no excuses. You can do hard things. So doctors told them that by his first birthday they believe chylothorax will be a thing of the past. They'll check his lungs again in December and Adam and her husband told me they hope by sharing their story they can help just one family who might be going through this same thing and, Amy, when Adler was born they didn't think he would be breathing but Danielle said he let out a scream that first scream and that sound will stay with her forever. A lot of moms can relate to ha. We're so happy for her and, of course, spreading such important message for everyone to hear. You can read her essay about mom gill on our website, goodmorningamerica.com. Robin, over to you.

This transcript has been automatically generated and may not be 100% accurate.

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