This sounds like a “pregnancy era”. The preferred generic term is, I think, “episode of care”, i.e. a window of time when a person experienced start to end of a certain care/sickness (not all have an end). Measurements, conditions, procedures, drugs over many visits dates may be linked together.
Lot of episodes of care
https://catalyst.nejm.org/bundled-payments-maternity-care/
@christian_reich this may be an opportunity to create a generic episode of care table, that links all tables of an episode together.
(Different thread)