The arrival of the couple's first child Archie was shrouded in secrecy, with newspaper reports indicating the 37-year-old former US actress had wanted a home birth at their residence in Windsor, west of London.
The document listed the baby's full name as Archie Harrison Mountbatten-Windsor.
It also detailed Meghan's occupation as "Princess of the United Kingdom".
The Portland facility claims to be the only private hospital in Britain dedicated to the healthcare of women and children, offering "world-class" maternity care.
The Duke and Duchess of Sussex broke with recent royal tradition in the choice.
Meghan also bucked modern precedent by keeping events around the birth and her recovery largely private.
This also contrasted with William and Kate, who on each occasion appeared before the cameras hours after the arrival of their newborn.
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