| Study | Reason for exclusion |
| Bateman 1994 | This is a retrospective study of unplanned and unattended home births. It is not a trial |
| Berghs 1995 | This is an observational study, not a trial. |
| MacVicar 1993 | The trial is not studying true home birth but ’Simulated home delivery in hospital’ |
| O’Connor 1986 | The trial is not studying home birth but vitamin K1. |
| Truffert 1998 | This is an observational study and not a trial. |
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