We are thinking of using this method. Its one of our options anyway. The other option is for DH to have the snip and stop at 3 as other then condoms or abstaining from love making its not a great idea for me to be on contreception and I know how great our track record is with using either method NOT. Obviously if we do this we are basically very open and happy with the decision that no4 could grace us with their presence and no4 could always turn into no4 and 5 although very unlikely seeing I have many fertility issues (a friend did this and had twins) I'd be very very happy if I did fall pregnant even if it meant a 9-10month gap but when I plan on fully BF and AF didn't return with DD for over a yr chances are slim even if I had proven good fertility.