Childfree

These are people who choose to live without kids and who dont want kids. ie. Childless by choice.

Other sites: The child free life
Some wiki stuff of DINK's.

It seems to be quite a popular choice of life for people in India and China, mainly with people who have come from working class backgrounds and are now considered middle class.

I think choosing DINK's who choose to remain childless rather than those who cant have kids is probably the better choice for this project.