The fertility rate - the average number of children a woman gives birth to
Big families, thing of the past to be honest. Advances in many areas have meant we no longer need 6 kids to ensure 2 survive to adulthood.
And then there's the cost, have you seen the price of 'named' trainers
all kids want a phone, TV, laptop/tablet, games console etc etc
Children eh, to be honest, I reckon many families are lucky to afford one