It depends on your situation. If you have two full time working parents then two kids is already a lot. Especially if you have your first kid in your thirties.

It depends on your situation. If you have two full time working parents then two kids is already a lot. Especially if you have your first kid in your thirties. If you have two parents working part time, maybe in jobs with flexible hours, and grandparents who can help out, and day care / schooling is affordable in your area, and you start having kids in your twenties, then having more kids can work.