I also go for as large a family as possible and I have had all girls a couple of time and all boys several times. I rarely get all six sleeping at home as like Arnie said the oldest is off to college if not by the time the last one is born by the time the last one becomes a toddler. I only had all six sleeping at the same time in one generation of one of my families in the 6th generation I had 2 sets of triplets (all boys). As I recall that is the only time.