define birth ratio??????
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The crude birth rate in a period is the total number of live births per 1,000 population divided by the length of the period in years. The number of live births is normally taken from a universal registration system for births; population counts from a census, and estimation through specialized demographic techniques
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the number of babies born in a particular group of people during a particular period of time
किसी विशिष्ट अवधि में किसी विशिष्ट समूह में जन्म लेनेवाले शिशुओं की संख्या; जन्म दर
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