I think on the current situation of things across the globe, I would sincerely advise parents should give birth to a number of kids they can bring up in consonance with their income.
Because as an average income earner, you shouldn't give birth to children you cannot feed or take good care of.
 gone are those days you need people to help work in your farm as parents.
Today, you have to spend money on school fees, clothing, electricity bills, feeding until they are up to an age to start staying on their own.
I feel rich people, can afford to give birth to as many as they want because the economy favours them.