You wisely included the disclaimer “To my knowledge”.

It was the position of the American episcopal conference that the inclusion of coverage for abortion and birth control was incompatible with Catholic beliefs. They began a campaign to oppose the Administration’s attempt to narrow the application of religious exceptions from its historic dimensions:

http://www.usccb.org/issues-and-action/religious-liberty/conscience-protection/index.cfm

In 1968, Pope Paul VI spelled it out in Humana Vitae. Not only was artificial birth control immoral, it was "an evil thing," he said, to make it easy to break moral law.

Michael Sean Winters is hardly a paragon of detached objective analysis.