I want to say that it is scientifically proven that breastfeeding helps babies grow better. As a doctor I know that human milk also gives immunity to babies and that is the reason, I want to advise mothers that breastfeed your babies ________________?
Now I'm stuck with this sentence!
Mothers leave breastfeeding their babies in a few months or may be a year. But I want to say that feed babies longer -say one and a half year or two years. But I don't want to be specific about this 'number'. I want to say that breastfeed as long as possible (Ah, this is weird!)
Now longer does not mean extending 'the period'. Someone may think that instead of she feeding a baby for just 5 minutes, should feed for 15 minutes -longer.
Feed your babies for years sounds awkward! Feed your babies for more period sounds again ambiguous.
Don't try to fill in the blank, it's not a strict rule here. I'm looking for a sentence that gives a clear message without any ambiguity.
A good answer can be used in a multiple way.
For instance, may be...
Long fed babies have better immunity
But 'long'? See there, I'm again stuck! :)