Received: 28 October 2020
Accepted: 18 February 2021
First Online: 17 March 2021
Ethics approval and consent to participate
: This work was registered as service evaluation project (ID 3079). All women booked for maternity care at the Rosie Maternity Hospital are asked verbally whether they give their consent for data to be used for research and this is recorded in their computerised hospital records. We can therefore confirm that this is a formally approved method of consenting for use of data in research at the Rosie Maternity Unit. Identifiable data were removed from cases to ensure anonymity. Identifiable data were removed from cases to ensure anonymity. Additionally, in accordance with the United Kingdom National Health Service National Research Ethics Service guidance, neither individual informed consent nor formal research ethics committee review was required, because the study was undertaken by the direct clinical team using information collected in the course of routine care.
: Not applicable.
: All authors have completed the ICMJE uniform disclosure form at ExternalRef removed and declare: no support from any organisation for the submitted work; no financial relationships with any organisations that might have an interest in the submitted work in the previous three years, no other relationships or activities that could appear to have influenced the submitted work. Completed disclosure of interest forms are available to view online as supporting information.