Detectives today released an e-fit of the missing mother of baby George three weeks after he was found wrapped in a blanket in a park.
The baby, thought to be just hours old, was found at The Mounds in Kings Norton, Birmingham, at 5.40pm on April 22.
The newborn was named George by hospital staff because he was discovered by a dog walker just before St George's Day.
Despite an urgent appeal to track down the mother, West Midlands Police have so far been unable to find her.
Today the force released a computer generated image of a woman they are keen to speak to as part of the ongoing search.
The e-fit was created by experts at Thames Valley Police after officers spoke to a key witness.
Today the force released a computer generated image of a woman they are keen to speak to as part of the ongoing search for baby George's mother
George (pictured) was just hours old when he was discovered by a dog walker in a park at 5.40pm on April 22
The force is urging anyone who recognises the woman to get in contact. They want her to know George is healthy and doing well with his foster carers.
Detectives say they are 'desperately concerned' and want to check she is doing okay, both physically and mentally.
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ShareDetective Inspector Neil Hunt, who is leading the investigation, said: 'Once again, I really want to reach out to George's mother as you are my concern.
'I'm worried about you and I need to make sure you are safe and well. We've not taken the decision to issue this image lightly or to frighten you.
'We simply want to find you so we can talk to you, check you are okay, and offer any help or support you may need.
'If anyone recognises this woman, or thinks they know who George's mother is, please do get in touch. You can do so in complete confidence if you'd prefer.
Despite an urgent appeal to track down the mother, West Midlands Police have so far been unable to find her. Pictured, George
'We've had a good response to our earlier appeals and I thank everyone who has contact us so far. If you know anything - no matter how small or insignificant it may seem - please get in touch.'
The force has previously issued photos of George as well as the £1 Matalan T-shirt and grubby blanket he was wearing when he was found.
Police said their enquires have been extensive and involved a number of leads - but have so far been unable to find the mother.
The woman has been described as white, around 5ft 6ins tall and of medium/large build.
She was wearing a light grey zipped hoodie and jogging bottoms. Her hair may have been in a low ponytail at the time.
CCTV footage shows a woman walking along Shannon Road just before 5.10pm that afternoon
Semi-retired royal engineer Terry Walsh (pictured), 64, was left stunned when his female dog, Hel, miraculously uncovered the hours-old infant wrapped in a blanket at The Mound in Kings Norton
He was wearing an orange striped T-shirt with a picture of a dinosaur on it and the words 'Dino Dude'
Officers have been handing out leaflets with the image in the local area, encouraging anyone who recognises the woman to get in touch.
Anyone with information is urged to contact police via live chat on the force's website or by calling 101, quoting log 3476 of April 22.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.
Speaking at the scene where baby George was found on top of a grassy mound surrounded by trees, DI Hunt previously said: 'We know mum gave birth away from hospital because of the way the umbilical cord was cut.
'It has been my focus since a week ago that we find mum to make sure she gets any support and medical attention. I am really concerned for her.
'Giving birth at any time is quite a significant medical event but if she's done it away from hospital then that raises it even more.
'We want her to know she's not in any trouble and won't be dealt with as such. My primary focus is her wellbeing and getting her any support.'
DI Hunt said George was born full-term on the day he was dumped and weighed 7lbs 4oz. He previously said: 'We released some CCTV of a lady who was in the area at the time.
'I can't say whether that was the actual lady who had the baby or not but we know she was in the vicinity at the right time and may have some pertinent information.'
George was found by a husky dog named Hel, belonging to semi-retired royal engineer Terry Walsh, 64.
The newborn has since been named George by hospital staff, because he was discovered the day before St George's Day.
George was born full-term on the day he was dumped and weighed 7lbs 4oz. Pictured, The Mound off Shannon Road, Kings Norton in Birmingham where he was found
The child was found by a passing dog walker in a park known in Birmingham as The Mound (pictured), off Shannons Road in Kings Norton
Without the help of his husky Mr Walsh said he would have walked by what he thought was a discarded blanket.
He said Hel ran over, lay beside the rolled-up shawl and began 'gently nudging' the baby with her nose.
The 64-year-old said: 'I turned round to grab hold of Hel so she didn't walk over the glass, and she went off to the blanket, lying next to it and started nudging it with her nose very gently.
'Suddenly I heard this baby cry. I think it was Hel's gentle nudging and the heat from my Husky bitch's body that woke the baby up.
'A bigger dog or another dog with a different temperament might well have just ripped and tugged at the blanket and the baby could have been treated like a ragdoll and then you've also got the foxes and the rats and everything in there. How would they treat a baby?'
George was wearing a £1 Matalan striped orange T-shirt with a picture of a dinosaur on it and the words 'Dino Dude'. He also wore grey bottoms and was wrapped in a white-and-grey blanket with a zig-zag pattern.
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