This is attempt by the Catholic Church to force their beliefs on those employees of theirs who are not Catholic.  The federal government by requiring that the insurance plans be  applied consistently across the board to all employees it is maintaining its secular obligation of not favoring one religion over another.  If the Catholic Bishops are so conscious stricken why are they so eager to obtain federal funding for all sorts of other activities. Let them totally abstain from receiving federal money and then they can do what they want.  You can't have you cake and eat it too.  From a practical standpoint, promoting the use of contraception saves the feds and insurance companies money since childbirth is far more expensive.  The federal government  under the establishment clause is forbidden from favoring one religion over another.  That's precisely what the Catholic Church is asking them to do.

I also understand that when they accept federal funding they don't (shouldn't) always get to dictate the rules.  If they want to serve only Catholics in only a Catholic way, terrific, but when they insist that federal money be only used in the way they dictate, they are violating the establishment clause. 

The Catholic bishops have reneged on the agreement made that helped Kennedy get elected which was that they would not insert religion into politics.  Catholic hospitals in many areas are buying up other hospitals and becoming huge regional medical centers. In many places they are sole providers and get tons of money from the feds and state to provide those services which must be offered in a religious neutral manner. If they had their way the Bishop of Rome would be telling ALL  American women what they could or could not do with regard to contraception.   Of course, this is also a very convenient way to hide their incipient scandals.

A nice history of the Kennedy/Catholic/Secularism from Catholic World at http://www.colleen-campbell.co.... I don't think the Bishops recognize that in their haste to construct a Catholic theocracy they risk alienating even Catholics as well as non-Catholics.