- method: prospective birth cohort (pregnancy retrospective, phone follow up at one year) - inclusion criteria: all live births at Woman and Infants Hospital of Rhode Island, from Jan. 2009 - March 2009 (70% of Rhode Island deliveries) - exclusion criteria: mother under 18, did not speak English or Spanish - results: - 71% completed 13 months follow up - 41% moved at least once (range 0-8; 69% once, 21% twice, 10% three or more) - those who moved tended to be younger, have fewer children, non-white, lower household income - moved in pregnancy ~2x more likely to move post-partum - 40% moved during pregnancy and 32% during moved during infancy, due to negative reasons (eviction, relationship breakdown, etc.)