This bill directs the Department of Defense to launch a five-year pilot program that treats pregnancy as a qualifying life event allowing military families to enroll in or change their TRICARE Select health coverage. Currently, pregnancy alone does not trigger this enrollment flexibility for military beneficiaries, which can limit access to prenatal care for spouses and dependents of active-duty service members and retirees. The Secretary of Defense must begin the program within 180 days of the bill's passage and provide Congress with an initial briefing after one year, followed by annual reports for the next four years tracking how many people use this new pregnancy-based enrollment option. The legislation affects military families eligible for TRICARE Select, the Defense Department's health insurance plan for service members and their families, and includes no specific new funding amounts, relying instead on existing Defense Department resources to implement the pilot.