1) Baby stat 2) Birth rate 3) Fertility 4) Fertility rate 5) Figure that concerned malthus 6) Important statistic 7) Natality 8) Rate 1) Fertility 2) Natality 
[n] - the ratio of live births in an area to the population of that area
birth rate noun the ratio of live births in an area to the population of that area; expressed per 1000 population per year
the proportion of births to the total population in a place in a given time, usually expressed as a quantity per 1000 of population.