His 43-year-old mother from Des Allemands, Louisiana, told KTLA5 how throughout her pregnancy, friends and strangers assumed she must have been having more than one baby.
"People would come up to me and say, 'Oh, I think that's twins or even triplets.
'Maybe there's another hiding behind one of the babies,"' she said.
As doctors delivered the baby in December, Mrs Grover said her husband Leroy was astounded with the size of the newborn.