noun
live birth rate
Technical demographic term referring to the number of live births per unit of population, often per 1,000 people per year.
その地域の生産率は年々低下している。
The live birth rate in that region has been declining year by year.
出生率 is the more common term for 'birth rate' in general demographic contexts. 生産率 is a specialized synonym used in technical or statistical reports, often emphasizing live births.
Compound of 生産 (せいざん, 'live birth') and 率 (りつ, 'rate'). The reading せいざん for 生産 is a specialized usage distinct from the common せいさん ('production').