Maternity care for mothers in Bronzefield Prison has been recognised with a special accolade from MPs.
Work by the maternity unit at Ashford and St Peter's Hospitals has received an award for innovative services for disadvantaged groups and communities.
The recognition came from the All-party Parliamentary Group on Maternity.
Before this service, women within the prison received little or no antenatal care. Now they have midwifery and high-risk obstetric consultant care.
"I am delighted with this award which recognises nationally the excellent work undertaken by the staff within the maternity services," said Eileen Nolan, Associate Director for Maternity Services at Ashford and St Peter's Hospitals and a practising midwife.
"Many of these women have underlying health problems when good antenatal care is even more important for the mother and baby."
Ashford and St Peter's Hospitals NHS Trust is a district general hospital service operating from two sites - Ashford near Staines and St Peter's near Chertsey.
HMP Bronzefield is a purpose-built prison for women at Ashford, which opened in June 2004.