Renamed from the previous “National Fertility and Family Health and Welfare Survey” in 2021, the “National Family and Fertility Survey," has changed in content and sample frame to reflect current social changes. While the pre-2021 versions surveyed only married women of childbearing age, the 2021 survey covers adult men and women aged 19-49, combining single men and women and married men into one sample. It is important that these changes are built into a stable system that can be maintained for the next 20-30 years.