Fertility rates are plummeting around the globe and will fall to shockingly unsustainable levels by the end of the century, posing an almighty challenge for the global economy. That's according to a major new study published in medical journal The Lancet, at least. 

The fertility rate is already below the replacement level required in countless nations and, by the year 2100, 97% of countries will be unable to sustain their populations.

Read on to discover the possible economic consequences of the great baby bust and find out what governments are doing to tackle the issue. Plus, we explore if the latest technological advances can save the day...

All dollar amounts in US dollars.