Volunteer to help out with secretarial work or translating for women who speak other languages. Or you can post flyers in neighborhood laundromats and grocery stores to publicize the mobile unit. Organize a fund-raising event. Funds may be needed in your community for an outreach mobile unit to bring prenatal care to women. Perhaps there's an adolescent pregnancy program in your area that needs funds.
Political advocacy gets results.
Clinics to provide prenatal care in areas where few private doctors are located. Research to discover and prevent the causes of infant mortality and birth defects. Find out if your state has a prenatal care advocacy group. Find out if maternal and child health has been given priority attention. Write to suggest that your state do what others have done and create a maternal and child health insurance program that helps the uninsured.