New mothers who shared a maternity ward with Zara Phillips yesterday said the extra special arrival was kept quiet by midwives.
Vicky Love, 34, left the unit yesterday afternoon after the arrival of 9lbs 1oz son Isaac on Wednesday.
Housing charity worker Vicky said: "We didn't see or hear anything. A lady in the bed next to me just said she heard today that Zara had been in the same ward as us. I had no idea. The staff did not say anything, and it seems as though she was treated the same as the rest of us."
The happy father, Peter, 37, a wine merchant added: "It was all very normal – no armed guards, no police, nothing to suggest she was here. She didn't go in and out the main entrance to the ward because nobody saw anything."
The parents, of Hucclecote, Gloucestershire, who have another son, Oscar, aged two, said sharing a ward with a royal made the day even more special. The ward at Gloucestershire Royal Infirmary is part of the Women's Centre, and expectant mums share small rooms with three others.
Another mother who gave birth to a baby boy on Thursday said Zara must have had a low-key delivery.
The 27-year-old said: "It is a brilliant maternity unit with amazing midwives who try to make everything as natural as possible, so she will have had a very calm delivery.
"There was no security or police around or anything special – everything seemed pretty normal.
"Being a new mum myself, I expect she feels the same as I do that it is a very private thing, so that's probably why she kept it quite normal."
A spokesperson for Gloucestershire Royal Hospital said: "Zara would have given birth in a room on her own and once it was established that mother and daughter were OK she would have been released.
"Most people leave here within six hours of giving birth as long as all is well. The only thing that can be paid for here is the after care."