Police have released an image of a newborn baby found abandoned in Plaistow, east London.
Officers hope the picture of the baby - who has been named Harry by medical staff - will encourage his mother to come forward.
Baby found in park
Baby found in park
Police were called at approximately 08:20hrs on Sunday, 17 September to a park area close to Balaam Street, London E13 following reports of an abandoned baby.
Officers and the London Ambulance Service attended and the boy, who was carefully wrapped in a white blanket, was taken to an east London hospital where he is being cared for.
Baby was found in this cordoned area
Baby was found in this cordoned area
Detective Inspector Ian Baker, leading the inquiry, said: "Baby Harry is doing well under the care of hospital staff but we are very worried about his mother.
"If you see this appeal, please come forward and let us know you are safe. I know you must be feeling very frightened and alone to have done what you did but please make contact with us or your local hospital or GP surgery so they can check you are OK and offer you medical care and support.
"Little Harry needs to be reunited with his mother so we would urge anyone else with information, or who saw anything out of the ordinary in the Balaam Street area on Sunday morning, to please come forward."
Anyone who can help is asked to call police on 020 8217 6528 or via 101.