Her road to giving birth to her first child, Addie Eve, has been littered with obstacles and anxieties.

After undergoing a kidney and pancreas transplant three years ago today, Ms King, 38, thought her chances of becoming a mum had been lost.

But on May 28 at Westmead Hospital, seven weeks early and by caesarean section, her miracle baby arrived.

Speaking from the hospital where little Addie remains in medical care, Ms King said it has been an emotional and rewarding journey.

"She's my miracle baby," the Tamworth woman said.

"It took a lot of hard work and planning, a lot of monitoring and doing the right thing, but we got there."

To say Ms King was a high-risk pregnancy is an understatement.

Doctors feared her high-blood pressure may have forced her kidney to reject or even put her life in jeopardy.

She was forced to undergo daily blood pressure tests and regular ultrasounds leading up to the pregnancy.

Eventually, at just 33 weeks, doctors thought Addie's lungs were well developed enough to welcome her into the world.

"It was pretty scary and I didn't know day-to-day whether she would make it," Ms King said.

"But when they took her out and I heard her cry for the first time, I knew it was all worth it."

Addie, who was born at just 1.6kg (or 3.5 pounds), is now breathing on her own and being fed through a nose tube.

Her prognosis is positive and Ms King and partner Brock Sampson are hoping to return home with bub in the coming weeks.