Countries experience a rise in birth rates during stage ii of a demographic transition pattern because:
An outcome of the decline in mortality in the stage is more and more fast growth in population increase (a.okay.a. "population explosion") as the space among deaths and births grows wider and wider. Be aware that this increase isn't because of a growth in fertility (or start fees) but a decline in deaths.
However, birth prices are nonetheless excessive in degree 2. There may be a time lag between the enhancing situations and any next changes in own family size, so women are nonetheless having many youngsters, and now extra of those youngsters are living into maturity.
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