I have 3 DC, DS 6, DS 4 and DD 4 mths.
When my first child was born, he had eczema and sensitive skin, we live in an extremely dry climate with weather extremes, so our Dr recommended bathing once a week.
We do not have a bathtub, only a baby one we put in the shower for our daughter now. The boys have of course outgrown it.
As our other children have come along we have kind of stuck to this schedule.
We of course wash them any time it is needed, for nappy blowouts, when they are ill, if they get extremely dirty or sweaty, or if they request a shower.
But barring any of these, a weekly bath it is.
Recently I was spending some time with my sister, she commented that she needed to bath her daughter. I said oh really, I thought you only bathed her yesterday! My sister said she bathes her at least every other day.
My sister lives in a different climate than I do, we were at my parents' for a visit.
My sister was shocked when I said we only bath/shower our children weekly, and brought up that they wouldn't be used to regular showers when they hit puberty. I replied that that is a conversation we will have at that time, but for right now they aren't producing BO and there is a lot of research to suggest that excessive washing dries out the skin and depletes natural oils.
Myself and my husband shower every other day unless we have been sweating a lot.
My sister said that she thinks this is a bit 'grimy'. I'm feeling terrible now that maybe we are bringing our children up with bad hygiene habits?! I never notice them smelling bad, apart from my 6yo who is learning how to wipe, and if this occurs of course we have him shower.
We of course wash hands and face daily, as necessary.