The parents of rare identical quadruplets say they feel like first-time parents again, but their biggest challenge may be telling the girls apart.

The four baby girls of Karen and J.P. Jepp remain in a Calgary hospital, needing additional care because they were born premature.

"They're tiny and they're scared, and we're nervous," Karen told a press conference Tuesday.

The parents already have a two-year-old son. But giving birth to quadruplets has been an overwhelming experience.

Karen and J.P. had to travel to a Montana hospital for the birth, because Calgary hospitals lacked enough beds or staff to offer proper care.

This year alone, at least five Alberta women have been sent to Benefis Hospital in Great Falls, Mt. to give birth.

"(There were) only three beds available in the entire country, so it was the right decision to send us where the four girls and Karen could be looked after together," J.P. told CTV Newsnet on Tuesday.

All four girls have since been transferred to a Calgary hospital, where they will likely remain for the next month.

J.P. said the hardest part was being away from their network of family and friends. But now, it could be telling which girl is which.

"That causes me a lot of anxiety to be honest," said their father.

They don't plan on having that problem for too long. The Jepps say they will immediately start dressing the girls differently to help them establish their own identities. They may also paint the girls' nails with different-coloured polishes to help keep them straight.

"We really want them to be individuals when they're growing up," said the proud dad. "The rest of the world is going to be looking at them together as the quads."

With so many new mouths to feed, the Jepps are now looking for a bigger home. They currently live in a two-bedroom townhouse.

The couple already have a two-year-old son, who has the blessing -- or challenge -- of growing up with four younger sisters.

The girls were born on Sunday, at the Benefis Hospital in Great Falls, Mt.

It cost $30,000 for each day Karen Jepp and her babies received care in the Montana hospital. In Calgary, it would have cost less than $11,000 per day.

Meanwhile, Jepp's sister Kate said the couple has already received calls from celebrities, including talk show host Ellen DeGeneres, so the girls may make a television appearance soon.

The family's obstetrician says the odds of naturally conceiving quads are between one in 13 million and one in 64 million.