A woman with post natal depression has been missing since Wednesday night.
Hemel Hempstead mum Michelle Higgins could now be anywhere in the country, say police who are becoming increasingly concerned about her welfare.
She was last seen on July 15 at around 7.45pm by a family member.
The 32 year old is thought to be getting about in a silver Volkswagen Golf, registration V25 MAM.
She is white, of medium build, 5ft 3in tall, with long blonde hair.
When she was last seen she was wearing a black and beige camisole top, black jeans and black and gold sandals.
It is thought that she was seen in Cambridgeshire on the night that she went missing.
Police have confirmed that a ring found in Bournemouth with the name Michelle engraved on it does not belong to the mum.
Anyone with information should call Herts Police on 101.