What can rapidly be seen is that Eastern Europe has the very unusual combination of both very low fertility and comparatively low first birth ages (in the Serbian case this currently seems to be somewhere round 25). Now what we do know is that in modern developed economies this age seems to trend upwards, slowly and inexorably, towards the 30 years of age range. [...] So eastern Europe is set to experience a continuing process of rising first birth ages, this is also likely to last for a good number of years, and during this process one outcome is guaranteed: a continuing birth dearth as people postpone having children. In many ways these countries are now firmly set between the proverbial rock and the hard place, as they badly need to raise the level of their economic 'net worth' and yet in order to achieve this objective they are only likely to produce less and less children, which means the structural problems in their population pyramids can only deteriorate.
As I say, those excluded from the EU can only expect an even worse variant on this process, since they are very unlikely to experience significant inward migration, while young people from those countries can be expected to leave in search of work in ever growing numbers. The main problem is that many people [...] are in complete denial on the importance of all this.