Firing is not specifically stated...
but it is implied by the removal of the protection from discrimination by an employer if an employee chooses to obtain other insurance coverage or contraceptives from another source.
Is pregnancy a medical condition? According to most people it is, so by logical extension contraception is a means of preventing a medical condition much like getting annual flu shots.
What is really happening here is that our ever dumber politicians are attempting to create an arena in the work environment where the employer's religous beliefs or moral convictions take precedence over the employee's.
And all of this is still ignoring the blatant HIPPA violation.