PHOENIX - A woman died hours after giving birth to quadruplets at a Phoenix hospital, a close friend of the family said Saturday.

Erica Morales, 36, never got to hold her newborns before she passed away early Friday morning after a C-section surgery at Banner Good Samaritan Medical Center, Nicole Todman said.

"They were transporting her from the surgery to whatever room, and she was still unconscious at that point. So, no, she never got to see them," Todman said.

Morales was about seven months into her pregnancy when she delivered three girls and one boy Thursday, according to Todman. She has been one of the few able to visit the premature newborns and said they are doing well.

"They're beautiful," Todman said. "They have tubes in their mouths and their noses. They've got little monitors and wires all over their body."

The infants will likely remain hospitalized for the next two months while doctors help them to get stronger and each reach a goal weight of 5 pounds, Todman said. Currently, they all weigh between just above 2 pounds to just above 3 pounds, she said.

Morales was initially hospitalized for high blood pressure. Complications ensued before Morales was taken into surgery, Todman said. She does not know what led to her passing.

"I don't even care to know," Todman said. "It doesn't matter why. She's still gone."

Hospital spokeswoman Toni Eberhardt declined comment Saturday, but she released a statement from the hospital: "Our heartfelt thoughts and condolences are with the family during this very difficult time."

Morales, a real estate agent, and her husband, Carlos, who works in manufacturing, had been trying to conceive a baby for two years, Todman said. She said Morales tried everything from acupuncture to fertility treatments. Morales suffered a miscarriage before becoming pregnant last June.

Todman, who has been best friends with Morales since childhood, said Morales was more nervous about being a new mother than raising four children at once. Because of her previous miscarriage, Morales was apprehensive about getting too excited about the babies' arrival. She mainly focused on doing things correctly throughout her pregnancy such as eating enough, Todman said.

"Her focus of her pregnancy was to make sure she did everything to make sure they were healthy so she was able to bring them into this world - and she did," Todman said.

On Friday, Todman started a GoFundMe fundraising website for Carlos Morales and the infants on Friday. The site had received more than $15,000 in donations as of Saturday afternoon.

"I'm so grateful for the overwhelming support and the wonderful comments, and so are Carlos and Sandra, Erica's mother. They are so entirely grateful," Todman said.