They were thrilled when Julia became pregnant.
They were even more surprised when they learned Julia was carrying two children.
Doctors say technically, the two babies are not "twins."
They have a name for this. It's called "superfetation."
It means a child is conceived while the mother is already pregnant.
Doctors say both babies are perfectly healthy.
Even though the babies are two and a half weeks apart, they expect the pregnancies to proceed at an even pace.
During a sonogram the technician asked Mrs. Grovenberg, "How far along do you think you are?"
She answered, "Well I know I'm 8 and a half weeks along because I've had a cycle."
The technician responded, "No, this baby is 11 weeks and one day."
The two babies are due in early December.