This really isn't anything new though. There was a convention talk called something like "Responsible Child Bearing in the Time of the End." It was later published in the WT. Basically the idea is that the GT is so close having kids will be a pain in the ass.
In my congregation we had several families pump out like 5 or 6 kids over the course of a couple of years and they were definitely looked down upon for having kids like that. When the women were all knocked up for round 2 the elders used that convention part as basis for a local needs talk.