natality
/neɪˈtælətɪ/noun
mass noun
- the ratio of the number of births to the size of the population; birth rate出生率：
in spite of falling natality, the population as a whole went up.
尽管出生率在下降, 人口总数还是上升了。
词源
late 19th cent.: from French natalité, from nat- 'born', from the verb nasci.