let nature take its course

verb2

•
To permit events to proceed or a situation to develop without intervention or interference.
- A boat trip to St. Joe! I and the Missus and the two love birds. And I'd see to it that the chaperons kept their distance and let Nature take its course. — 1917
•
(euphemistic) To allow a person or animal to die without medical or other attempts to forestall death.
- I have slashed veins in my ankles and am pleasantly bleeding to death in this hot water. There is no greater kindness you can do me than to let nature take its course. — 1984

forms

letting Nature take its course · letting nature take her course · letting nature take its course · lets Nature take its course · lets nature take her course · lets nature take its course