DIXON, Tenn. — When Shelby Martin began experiencing intense pain during her third pregnancy, she sensed something was different. The 30-year-old mother of four said the discomfort was beyond anything she had felt before, later discovering that the sensation came from carrying a record-breaking baby.
Martin gave birth to her son, Cassian, on July 29 at Tristar Centennial Women’s Hospital in Nashville. Weighing in at 12 pounds, 14 ounces, Cassian was one of the largest newborns ever delivered at the facility, drawing gasps from doctors and nurses in the delivery room.
“I didn’t think I was going to survive,” Martin said. “My physical therapist later explained that he was essentially popping my hip joint out of socket.” Despite the extreme pain, she remained unaware of just how large her baby would be until the moment of delivery.
According to the American Pregnancy Association, the average full-term newborn weighs between six and nine pounds. Cassian’s birth weight was nearly double that range, making his delivery not only medically significant but also deeply personal for his family.
By the 36th week of pregnancy, Martin’s obstetrician informed her that her baby was already measuring about ten pounds. A cesarean section was scheduled for safety, as a vaginal delivery could have posed serious risks to both mother and child. “As soon as they pulled him out, everyone in the operating room collectively gasped,” Martin recalled. “They were absolutely shocked at his size.”
Although Martin did not have gestational diabetes — a condition often associated with larger infants — postpartum blood tests revealed mild insulin resistance. Doctors believe that this factor may have contributed to Cassian’s size and the temporary glucose issues he experienced after birth.
“He was so puffy,” Martin said. “He couldn’t even open his eyes for three days.”
Following delivery, Cassian was admitted to the neonatal intensive care unit (NICU) for a 10-day stay. His pancreas was not producing enough insulin initially, and he also required oxygen support. The medical team at Tristar Centennial monitored his progress closely, eventually discharging him after his condition stabilized.
Today, Cassian is thriving. At just ten weeks old, he already weighs 16 pounds, placing him in the 97th percentile for his age group. “He’s the sweetest little boy,” Martin said, expressing relief and gratitude after a challenging pregnancy and delivery.
The baby’s arrival carried deep emotional meaning for Martin and her partner, Joshua Thomas. Cassian was born exactly one year after the couple suffered a miscarriage — and on Martin’s own birthday. “It felt like everything had come full circle,” she said. “After the loss, I never expected something so beautiful could happen exactly a year later.”
The hospital, which shared the family’s story on social media, described the birth as a moment of hope and resilience. “Their story is a beautiful reminder of love and perseverance,” the hospital wrote in a statement celebrating Cassian’s arrival.
The delivery also underscored the importance of maternal health awareness, particularly in cases where pregnancies deviate from expected norms. Medical experts say that unusually large newborns, known as macrosomic babies, occur in about one out of every 100 births. Factors such as genetics, maternal weight, or metabolic conditions can contribute, though each case is unique.
Martin’s recovery has been steady, and she said she is grateful to the medical team who guided her through the experience. She continues to share her story as a message of strength to other mothers who may face pregnancy complications or loss.
“Every moment I look at him, I’m reminded of what we overcame,” she said. “Cassian is our miracle — a reminder that even after heartbreak, there’s hope.”
Cassian’s story, and his remarkable size, have captured hearts across Tennessee, not only as a medical rarity but as a testament to the power of perseverance, healing, and family.
