My one month old DD has been a good sleeper from day 1 (as far as newborns go). She has been able to go 4/5 hours without a feed at times while cluster feeding other times. The midwives told me not to let her go 5 hours and even 4 isn't so good this young. I've been waking her after 3 1/2 - 4 hours usually as I don't want the milk supply dramas I had with DS. But I'm wondering, at what age is it ok to let them go longer for a sleep without affecting milk supply/growth? I know every case is different, but in general?