Reginald Hamlin, co-founded the Addis Ababa Fistula Hospital, the world's only medical centre dedicated exclusively to providing free obstetric fistula repair surgery to poor women suffering from childbirth injuries.
They also co-founded an associated non-profit organisation, Hamlin Fistula Ethiopia.
Hamlin has been recognised by the United Nations agency UNFPA as a pioneer in fistula surgery for her development of techniques and procedures for obstetric fistula treatment.
The Hamlins, together with the hospital staff, have treated more than 55,000 women to date for obstetric fistula.