Scholars traditionally argued that industrialization, urbanization, and educational expansion lead to a decline in extended families and complementary rise in nuclear families. Some have suggested that such transitions are good for young married women because living in nuclear families benefits their health. However, extended families may also present advantages for young women's health that outweigh any disadvantages. This talk will summarize research examining 1) whether young married women living in nuclear families have better health than those in patrilocal extended families, and 2) whether young married women's living arrangements are changing over time and, if so, how such changes affect their health. Results show that young married women living in nuclear families do not have better health than those in patrilocal extended families.