Footnotes

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• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Provenance and peer review Commissioned; internally peer reviewed.

• ↵This is with the exception of, of course, ‘carers monitoring an artificial placenta’ for example, as Romanis points out in her paper. While there is no doubt there may be multiple agents who assist and provide ‘labour’ in this sense, they arguably lack a comparable candidacy for gestational parenthood relative to, say, a surrogate.