Replacement Level Fertility: Replacement level fertility is the total fertility rate needed for each woman on average to produce enough offspring that will replace the parents in the population. It's usually around 2.1 children per woman to account for mortality rates.
Birth Rate: Birth rate refers to the number of live births per 1,000 individuals in a population over a specific time period. A low birth rate indicates lower fertility levels within a population.
Total Fertility Rate (TFR): The total fertility rate is an estimate of the average number of children each woman would have during her reproductive years based on current age-specific birth rates. It provides insights into fertility patterns and potential population growth or decline.