"And now contraceptives are considered natural; they aren't at all controversial."

The resistance to these antibiotics can be considered natural or intrinsic.

What they had done could almost be considered natural, inevitable.

It was considered natural that I become a student of the Cross affair.

Meaning: If all things and technology made by man (humans), wouldn't that be considered natural.

The secrets agency also did not define what kind of disaster was considered natural as opposed to human.

"Very much of what we consider natural is mutable," Mill said.

Then, in course of time, this will be considered natural.

What is now considered natural is the result of learned artifice.

Pointed ears had always been considered natural, and round years unnatural.