Ethics Daily has posted a couple stories about the new imperative among Southern Baptists to reproduce. Bob Allen has a story about how "Under-Population Worries Southern Baptist Leader" Al Mohler. Miguel De La Torre has an article about how this "'Full-Quiver' Theology Appeals to Race".
Jesus commanded Christians to "make disciples," not "make babies." The kingdom of God does not grow by biological reproduction, it grows by spiritual reproduction.
The Genesis command for mankind to "be fruitful and multiply" has been amply fulfilled. Cities the world over are teaming with evidence of that. In a world that is struggling to find, produce, equitably distribute, and preserve the resources necessary to sustain life, the responsible thing for Christians to do is to have fewer children than they had before modern forms of birth control became available.