The mum of a baby girl found dead on a Marston footpath is thought to have been between 14 and 21 years old, police have confirmed.
The baby weighed around 8lbs and was born at full term, officers revealed at a media briefing in Kidlington this afternoon.
They also said there were no signs of the newborn having been injured before she died.
The head of midwifery at Oxford University Hospital NHS Foundation Trust, Jane Hervé, attended the briefing to appeal to the mum.
She said: “I understand that you have probably given birth to your baby alone as you may have been very frightened about what may happen to you.
“I appreciate this situation is very difficult for you but I would like you to know we have lots of midwives and doctors in the hospital who really want to help and support you during this very difficult time.
“Please be reassured that they will not judge you but will care for your physical and emotional needs in the way you need right now.
“I want you to contact us so we can check you over as it is likely you will need some medical and emotional support. Please do not leave it too long as I do not want you to get sick. I must stress that is so important that you are seen.”
The baby was found by a member of the public on a path off Edgeway Road on Monday.
A medical exam was carried out yesterday and police said they believe the newborn was left on the path between one and three days before she was found.
Officers have been speaking to colleges, schools and charities to see if anyone can trace the mother.
The mother of the baby girl is being urged to contact a midwife by calling 01865 740429. Or to speak to a specialist officer she can text or call 07470 911038.
Anyone else with any information is asked to call police on 101.