Originally Posted By: terrytnewzealand

Eventually.


Yes, eventually - within a generation. This drop has been seen between the the post war baby boom and today's birth rates in the West.
Were you hoping for something faster? I'm not sure how you would lower fertility rates replacement levels (or less), in a shorter time than 1 generation - short of a mass sterilization program focussed on the areas of high population growth, namely Africa and South Asia.