The Age-Specific Fertility Rate (ASFR) measures the number of live births per 1,000 women within a specific age group in a given year. It is a vital demographic indicator that helps understand fertility patterns within different age brackets, typically grouped in five-year intervals (e.g., 15-19, 20-24, 25-29, etc.). Unlike the general fertility rate, which calculates births across all women of reproductive age (15-49 years), ASFR provides a more detailed view of fertility trends across different life stages.

ASFR is important because it reveals variations in fertility behaviours across age groups, allowing policymakers and demographers to understand better when women are most likely to have children. This information is crucial for creating and evaluating family planning programs, understanding changes in birth rates over time, and predicting future population growth. It also helps identify shifts in societal trends, such as delays in childbearing due to factors like education or career priorities. Additionally, ASFR data can be used to analyze the impact of reproductive health policies, ensuring that they are tailored to meet the specific needs of women at different stages of their reproductive life. Understanding ASFR helps optimize resources for maternal and child health services, ultimately contributing to better societal outcomes.