Demography Jargon: "Birth Rate" and "Crude Birth Rate"

Birth Rate: The ratio of the number of live births in a given period of time (usually a year) to the number of persons in a given population (the population number being calculated at some point in that year). Most birth rates are expressed in terms of births per 1000 people. 
The birth rate can be found via the following basic equation: (Births divided by Population) x 1000.   It can also be expressed as: (Births/Population) x 1000.

Crude Birth Rate: The ratio of the number of live births in a year (usually) to the total population of all males and females in a given population (a nation, state, etc.) per 1000 people. The crude birth rate can be found via the following equation: 
(Births divided by the Total Population) x 1000 = Crude Birth Rate.  

Bear in mind that the total population in calculating the crude birth rate includes both males and females in the total population.