My reading of the data and graph on that site indicates that the births increased from around 600,000 to over 750,000 during the war.  The birth ‘rate’ in turn would be higher as the population fell during the same period.

It is true that many parents and family may well wish that children born into certain situations had never been born but quite frankly it is not their place to do so - the ones you should be asking are the children, can you point me to many of those who express such desires?