Finn has been a doctor for 44 years. He is trained as a specialist in gynaecology and obstetrics and later completed an expert qualification in infertility (fertility). Finn helped establish the fertility clinic in Brædstrup in 1994. The clinic later moved to Horsens Hospital. He has served as clinic director for a total of 19 years and has helped bring about more than 6,000 pregnancies, resulting in a similar number of children.