I'm not married but I think is up to the couple to decide that. What may be good for some may be bad for others.
You are correct but there is not official position on the issue anymore as it used to be in the past.
The General Handbook of Instructions clearly states it is an issue between the couple and the Lord.
God wants us to be wise in having children. He doesn't want us to take on so much responsibilities that we are financially strapped to the point that we may lose our children. It doesn't put exceptions on the first commandment given to man. No where in the scriptures does it say to have big families