i had my first four in 4.5 years the yunger 3 were 2,1, and a new born and yes it was hard but i got them all in the same routine and while some of its a blur it wasnt anywhere near as bad as people made out it would be had number 5 4.5 years after number 4 and forget the routine it just never happened and have just had number 6 7.5 years after number 5 and while he is in a great routine as the others are now 17,15,13,12,and 8 everyone is all over the place and i feel its heaps harder now that they are older then when they were little.