The National Survey of Family Growth (NSFG) gathers information on family life, marriage and divorce, pregnancy, infertility, use of contraception, and general and reproductive health. The NSFG was first designed to be nationally representative of women 15-44 years of age in the civilian, noninstitutionalized population of the United States (household population). The survey sample is designed to produce national data, not estimates for individual states. Later changes to the NSFG include adding an independent sample of men (2002) and expanding the age range to 15-49 (2015). NSFG is conducted through in-person interview, with a portion of the more sensitive questions answered privately by self-administration. The interviews are voluntary and confidential. The response rate for recent data releases is around 73%. The NSFG is used: by scholars in the behavioral sciences (e.g., sociology, demography, and economics) to study marriage, divorce, fertility, and family life; by scholars in public health to study reproductive, maternal and infant health topics; by agencies of the US Department of Health and Human Services, to brief senior officials and to inform program decision-making, in research programs and in health and social service programs; by state and local governments to plan health and social service programs; by the press, to prepare articles on a number of topics related to health and family life; and more.