There are asterisks next to gender (must have) and birth sex (must support), however the explanatory text provided in Profile specific implementation guidance refers only to gender, not sex. Suggest mentioning birth sex. Just noticed this is a US Core page - not sure if this comment is appropriate for this review. Please align with results of the Gender Harmony project before publication if possible or add a note indicating this ongoing work.

Originally submitted against HRex as https://jira.hl7.org/browse/FHIR-23202 by Gay Dolin.  Resubmitting as an issue against the correct IG