We aer thinking about having a fourth and I have a 3 year age gap (actually one month less than 3 years) between ds1 and ds2 and a 4 year age gap between ds2 and ds3. Time is getting one for me age wise so we can't wait that long this time. If yor age gap is going to be small, does it make a difference if it is 2 years or 2 and a half years? Does that extra half year make much of a difference?