Infirmary shifts - do i need to use all 3 shifts to have reduced comfort level for births?

[Sellec]

Surviving mars wiki says - "During an active infirmary shift, and for 24 hours afterwards...lowered from 70 to 55 comfort".
So i need to have only one active shift to have reduced comfort level?
But if so why i see message "Birth Thresthold: 70 Comfort" at 2 and 3 shift periods with 1st active shift?

P.S. related to this steam discussion.

 

[Fox_NS_CAN]

Surviving mars wiki says - "During an active infirmary shift, and for 24 hours afterwards...lowered from 70 to 55 comfort".
So i need to have only one active shift to have reduced comfort level?
But if so why i see message "Birth Thresthold: 70 Comfort" at 2 and 3 shift periods with 1st active shift?

P.S. related to this steam discussion.

Just to clarify, the wiki says the comfort level threshold for births has been reduced. You don't get reduced comfort.

If it does indeed last 24 hours, then 1 shift should be sufficient to keep the threshold level lowered indefinitely to allow births at a lower comfort level.

Multiple shifts do allow for more colonists to be treated for better health and sanity though.