Birthrate, also known as the crude birthrate, is the number of live births per 1,000 population in a given year. It is a basic measure of fertility in a population. The birthrate is influenced by various social, economic, and cultural factors, including the age and sex structure of the population, the average age at which people have children, the availability of contraception, cultural norms around family size, and economic conditions. A high birthrate can contribute to population growth, while a low birthrate may lead to population decline if not offset by immigration. Birthrates vary significantly across different countries and regions, reflecting diverse social and developmental contexts.