Period measures 口 Crude birth rate a Simple to calculate a Influenced by the gender and age structure a Its denominator includes many people who are not at the risk of childbearing a such as young women(under age 15), postmenopausal women (older than age so)and men Example a 100 persons consisting of 10 women and go men, each woman gives birth to 1 child, CBR=? a 100 persons consisting of 5o women and 5o men, each woman gives birth to 1 child, CBR=?Period Measures  Crude Birth Rate  Simple to calculate  Influenced by the gender and age structure  Its denominator includes many people who are not at the risk of childbearing ◼ such as young women (under age 15), postmenopausal women (older than age 50) and men  Example  100 persons consisting of 10 women and 90 men, each woman gives birth to 1 child, CBR=?  100 persons consisting of 50 women and 50 men, each woman gives birth to 1 child, CBR=?