advanced age
age
aging society
assistance
backing
birth
birth rate
block
childbirth
comparison
contrast
countermeasure
delivery
design
elderly
female
fertility
figure
government
help
issue
low
low birth rate
male
man
men
miniature
old
old age
oldage
people
person
plan
policy
postretirement
preparation
problem
program
rate
retired life
retirement
sitting
social
support
system
woman
women
wood
wooden