In the early weeks it is a good idea to weigh a baby to be sure that breastfeeding has been established. However I see little point in a baby who is older than 6 weeks being weighed monthly.
I think that excessive weighing of babies does nothing but cause unnecessary anxiety. Many mothers and health professionals do not understand percentile charts. Also the charts in my little red book are for bottlefed white babies.
Looking at the baby is often a more accurate way of telling whether it is thriving.
Prehaps we should weigh the mothers instead of the babies. Certainly many mothers have problems with weight.
Or joking aside we should have a well mother clinic instead of a well baby clinic. If the mother is healthy then the baby will generally be well looked after.