Really? Canada and the US have a teenage birth rates that are far higher than Europe's. So much for being responsible!

And countries like China, Japan, South Korea, etc have lower birth rates than many western countries.

As for bringing 3rd world countries babies into the Americas, that is the history of European immigration into this continent for the last 400 years. Wealthy Europeans rarely moved here. Restrictive immigration was a policy that Asians and Africans have had to undergo. Any European who wanted to come here for the last 400 years just needed to arrange transport. 

Your ancestors were probably part of the poorer group.