JaMichael Brown weighed in at 16 pounds, 1 ounce (Good Shepherd Medical Centre Marketing Department)
A Texas mother expected a big baby, but nothing like the 16lb 1oz one that emerged from the womb.
Janet Johnson remains at Good Shepherd Medical Centre in Longview, East Texas after giving birth to what her doctors called one of the biggest new-borns they have ever seen.
She was awaiting word on whether her son, JaMichael Brown, who was born on Friday, ranked among the biggest births in state history.
"Everybody was amazed that he was so big," Johnson, 39, said. "I don't think too many people have heard of having a 16lb baby."
Ms Johnson has gestational diabetes, which results in bigger new-borns for many mothers. Doctors had estimated JaMichael would be around 12lb prior to the caesarean birth.
The hospital has asked the state's vital records department whether JaMichael is big enough to approach any Texas newborn records, said Victoria Ashworth, a hospital spokeswoman.
He is certainly the biggest in the history of the Longview hospital and was born, Ms Ashworth said, almost two years to the day after the hospital delivered its smallest baby ever, who weighed just 15oz.
Guinness World Records said the heaviest newborn ever recorded weighed 23lb 12oz, born to an Ohio woman in 1879.
Ashworth said JaMichael, whose father is 6ft 7in, was likely to be transferred from the neonatal intensive care unit and into the regular nursery. Ms Johnson said she hoped to get her son home later this week - and return his newborn clothes that will not fit.