Her only hope of survival was a medical procedure that involved surgeons taking her out of the womb for 20 minutes when she weighed just 538g.
She was then put back inside her mum’s uterus where she remained for another 12 weeks — almost making it to full term — before Lynlee once again came into the world.
The miracle baby weighed 2.4kg when she was born again and following a brief check up she was taken to the nursery to be with the other babies.
“And it was very shocking and scary, because we didn’t know what that long word meant or what diagnosis that would bring.”
A sacrococcygeal teratoma is a tumour that develops before birth growing from a foetus’ tailbone.
According to Darrell Cass, the co-director of the Texas Children’s Foetal Centre, it is the “most common tumour we see in a newborn,” but “even though it’s the most common we see, it’s still pretty rare.”
Dr Cass continued saying: “Some of these tumours can be very well-tolerated, so the foetus has it and can get born with it and we can take it out after the baby’s born.
“But about half of the time, they cause problems for the foetus and it’s usually causing problems because of a blood flow problem.
“And in some instances, the tumour wins and the heart just can’t keep up and the heart goes into failure and the baby dies.”
One option was terminating the pregnancy but Margaret was reluctant having already lost Lynlee’s twin before the second trimester.
Margaret said: “Lynlee didn’t have much of a chance. At 23 weeks, the tumour was shutting her heart down and causing her to go into cardiac failure, so it was a choice of allowing the tumour to take over her body or giving her a chance at life.
The surgery in total took five hours but the part on the foetus only lasted 20 minutes.
Dr Cass said: “We don’t want the mum's health to be jeopardised.
“Essentially, the foetus is outside, like completely out, all the amniotic fluid falls out, it’s actually fairly dramatic.”
During the surgery Lynlee’s heart slowed to a virtual stop but she was kept alive by a specialist as doctors removed the bulk of the growth.
When they had done as much as possible she was put back in the womb.
She said: “It was her second birth, basically. I was willing to endure all those risks to give her a chance at life.”