1. (

• birthrate ,
• birth_rate ,
• fertility ,
• fertility_rate ,
• natality

) the ratio of live births in an area to the population of that area; expressed per 1000 population per year ;

2. (

• fertility ,
• fecundity

) the state of being fertile; capable of producing offspring ;

3. (

• richness ,
• rankness ,
• prolificacy ,
• fertility

) the property of producing abundantly and sustaining vigorous and luxuriant growth; "he praised the richness of the soil"; "weeds lovely in their rankness" ;