The main purpose of this legislation, titled the "IVF for Military Families Act," is to expand fertility treatment options for active duty members of the military and their dependents under the TRICARE health care program. The goal is to ensure that those serving in the military have access to necessary fertility-related care, which can be crucial for families trying to conceive. Key provisions of the law include the requirement for the Secretary of Defense to provide coverage for fertility-related care under TRICARE Prime and TRICARE Select.