Walker Pruett weighed just 1lb 3oz when he was born prematurely on April 25 2014.
Born at 26 weeks by emergency Caesarean, Walker was so fragile that his mother couldn't hold him for the first five days of his life.
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On April 26, Walker's parents, Erica and Jared Pruett, were approached by Deneen Bryan, founder of the charity Capturing Hopes Photography.
Deneen asked Erica and Jared if she could include Walker in her charity's 100 Days' project, which documents the first 100 days of a premature baby's life in a series of professional photographs.
The photos show Walker's incredible transformation from a baby so small he could wear his father's wedding ring as an arm band, to a 5lb three-month-old who is now at home with his mum and dad.
Deneen compiled the pictures into a time-lapse video, which Erica has said is a 'great gift'.
"It is really amazing to watch him grow," she wrote in her blog documenting Walker's development.
Deneen, a mum-of-six from North Carolina, knows just how precious the photos are to parents like Erica and Jared.
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In 1998 Deneen's six-month-old daughter Christina died after undergoing several operations, including a liver transplant.
Shortly before Christina died, Deneen was approached by a professional photographer who was offering to take photos free of charge for families in the hospital. Deneen said she didn't think much of it at the time, but now she cherishes the photo.
"After she [Christina] passed away, we got the photos in the mail," Deneen told The Blaze. "That's when I really realised how important those photos were. That was our only professional photo that we had of our family at the time."
The experience inspired Deneen to launch Capturing Hopes in 2011, to connect professional photographers with families who have children in hospital.
Walker Pruett is the first baby to be documented in the charity's '100 Days' project. He, however, was only photographed for 80 days before he was allowed to leave the hospital and go home with his happy parents.
Live Music Therapy For Premature Babies
Elizabeth Klinger, Augustin Morales, Lucy Morales(01 of05)
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Music therapist Elizabeth Klinger, right, quietly plays guitar and sings for Augustin as his mother, Lucy Morales, sits next to him in the newborn intensive care unit at Ann & Robert H. Lurie Children's Hospital in Chicago on Monday, May 6, 2013. "What music therapy can uniquely provide is that passive listening experience that just encourages relaxation for the patient, encourages participation by the family," Klinger says. (AP Photo/M. Spencer Green) (credit:AP)
Elizabeth Klinger, Augustin Morales, Lucy Morales(02 of05)
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Music therapist Elizabeth Klinger, right, quietly plays guitar and sings for Augustin as he grips the hand of his mother, Lucy Morales, in the newborn intensive care unit at Ann & Robert H. Lurie Children's Hospital in Chicago on Monday, May 6, 2013. "The music relaxes him, it makes him feel more calm" and helps him sleep better too, Lucy Morales said. "Sometimes it makes us cry." (AP Photo/M. Spencer Green) (credit:AP)
Elizabeth Klinger, Natalia Henner(03 of05)
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Music therapist Elizabeth Klinger, left, speaks with newborn specialist Dr. Natalia Henner in the newborn intensive care unit at Ann & Robert H. Lurie Children's Hospital in Chicago on Monday, May 6, 2013 during a break from playing guitar and singing for the young patients in the ICU ward. Many insurers won't pay for music therapy because of doubts that it results in any lasting medical improvement. Some doctors say the music works best at relieving babies' stress and helping parents bond with infants too sick to go home. (AP Photo/M. Spencer Green) (credit:AP)
Elizabeth Klinger, Henry Buchert, Stacy Bjorkman(04 of05)
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Music therapist Elizabeth Klinger, left, quietly plays guitar and sings for Henry Buchert and his mother Stacy Bjorkman, in the Pediatric Intensive Care unit at Ann & Robert H. Lurie Children's Hospital in Chicago on Monday, May 6, 2013. Research suggests that music may help those born way too soon adapt to life outside the womb. Recent studies and anecdotal reports suggest the vibrations and soothing rhythms of music, especially performed live in the hospital, might benefit preemies and other sick babies. (AP Photo/M. Spencer Green) (credit:AP)
Elizabeth Klinger, Augustin Morales, Lucy Morales(05 of05)
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Music therapist Elizabeth Klinger, right, quietly plays guitar and sings for Augustin as he grips the hand of his mother, Lucy Morales, in the newborn intensive care unit at Ann & Robert H. Lurie Children's Hospital in Chicago on Monday, May 6, 2013. Research suggests that music may help those born way too soon adapt to life outside the womb. Recent studies and anecdotal reports suggest the vibrations and soothing rhythms of music, especially performed live in the hospital, might benefit preemies and other sick babies. (AP Photo/M. Spencer Green) (credit:AP)