The TFR required for a population to replace itself exactly from one generation to the next, which is roughly 2.1 children per woman in most developed countries. Current Global Trends (2026 Projections)
The world is currently in a period of significant demographic transition, with birth rates generally declining across most regions. birth rate
The most common measure, calculated as the number of live births per 1,000 people in the total population. In 2024, the global average was approximately 17 births per 1,000 people . The TFR required for a population to replace