Emma said donating her breast milk had been "such a worthwhile thing to do".
The Human Milk Bank in Birmingham supplies breast milk to sick and premature babies in the region.
A study co-authored by researchers in Devon finds breastfeeding can lead to epigenetic changes.
Northern Ireland has the lowest breastfeeding rate in the UK, according to the Public Health Agency.
Stacey Murray says the signs will help mothers feel more at ease when breastfeeding in public.
The scheme is part of World Breastfeeding Week, from 1 to 7 August, organisers say.
Rachael Bews says she told on the way her child would not be allowed on site. Amazon has apologised for not communicating its policy clearly.
Alexis Fullard writes reviews to help other mums feel feel safe breastfeeding in public.
