Toronto (IANS): A Canadian woman did not know she was pregnant till she delivered a healthy seven-pound baby boy last week.

Thirty-six-year-old Juanita Stead, a native of Newfoundland province, went to hospital with sharp lower back pain, thinking she had kidney stones.

On her X-ray examination, doctors found no signs of kidney stones. Instead she was told that she is pregnant and about to deliver a baby.

"It's no kidney stone. You've got a baby ready to be born," doctors told the shocked woman.

"No, that can't happen.you had the wrong X-ray file," she said in protest.

But in the next six minutes, she delivered a healthy seven-pound, 12-ounce boy born - at 12:31 a.m. local time on New Year's Day.

Named Nicholas, the boy has become one among the first Canadian babies born in the New Year.

"He (the baby boy) came out bum first," the Canadian Press quoted the woman as saying.

Her husband Terry said, "Honest to God, I just don't have words to explain it."

The woman said she never experienced any pregnancy-related symptoms such as morning sickness, kicking in her womb or irregular menstrual cycle.

In fact, her menstrual cycle remained regular throughout her pregnancy, she said.

The woman said, "People have been saying to me, same as I have been saying, 'How could you not know you was pregnant?' Everyone is still in shock I think."

After the sudden birth of their son, the couple - who live in the small town of Port de Grave in eastern Newfoundland - went to have a New Year's party at her sister's house.