After one scan, Holly Lewis said she was told her baby had died and in another she was told she had an ectopic pregnancy.
But baby Lacey - who weighed in at 6lb 30z - is proof that the doctors were wrong both times.
Holly told her local paper she was first referred to Birmingham Women's Hospital after suffering a bleed early in her pregnancy.
She claimed she was told the foetus had not survived after a scan. But a blood test the next day revealed she was still pregnant. But when she again suffered bleeding, Holly said she was diagnosed with an ectopic pregnancy but discharged herself because she thought medics were wrong.
She said she was told she was still pregnant when she rang the hospital the next day for the results of another blood test.
"I was distraught when I was told I had lost her," said Holly, from Quinton, West Midlands.
"But I had a feeling they were wrong. I've already got another little girl and my earlier pregnancy meant I had an instinct I was still carrying Lacey."
Cuddling Lacey, who was born at the hospital, Holly said: "She is my little miracle," Holly said. I'm just glad she is here."
But she added: "I've never had an apology from the hospital and I'm disgusted at their actions."
Hospital chief executive Prof Ros Keeton said: "When women come to the Early Pregnancy Assessment Unit, we always explain what potentially may be causing any problems and the tests they will need to help us to make a diagnosis.
"We are always very honest with women about the range of scenarios.
"It is not always possible to detect a pregnancy on scanning in the very early stages and so we can not rely on this as a definitive diagnosis.
"Women are offered a range of investigations following which, the right plan of care can be offered.
"We are satisfied the care provided to Ms Lewis was appropriate and followed national best practice for early pregnancy assessment.
"We are obviously delighted Ms Lewis has gone on to have her baby with us."