Charity The Fostering Network has warned that the UK needs an estimated 8,750 more foster carers to head off a foster care crisis.
Clare Marshall, who went through more than 40 different foster homes between the age of two and seven, says it was a "difficult and lonely time".
"All I wanted was a family to look after me and care for me," she told John Humphrys.
Robert Tapsfield, chief executive of the Fostering Network, says there are not enough good foster parents which means many children do not get the family they need and must move around.
Foster parents need a huge amount of skills and need "space in their heart" for children who need special help, he explains.
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