| Number | % |
---|---|---|
Age (years) | Â | Â |
 Mean: range | 30.7 | 18–40 |
  < 30 years | 8 | 36 |
Ethnic group | Â | Â |
 White British | 17 | 77 |
 South-east Asian | 2 | 9 |
 Other | 3 | 14 |
Highest education level | Â | Â |
 School | 7 | 32 |
 Further education | 2 | 9 |
 Degree | 8 | 36 |
 Higher degree | 5 | 23 |
Previous birthing experiences | Â | Â |
 Primagravidae | 9 | 41 |
 Previous retained placenta | 5 | 39 |