In an effort to improve prenatal care for troops and family members, a group of lawmakers wants to give Tricare users more flexibility to change their health-care plans when they get pregnant. The House's version of the must-pass annual defense policy bill already includes language that would add, on a trial basis, pregnancy to the list of reasons why Tricare users could change plans. Now, a group of lawmakers is introducing separate legislation on the issue, with the goal of convincing