title: WHO collaborative study on breast feeding.
abstract: WHO, concerned with the declining breast feeding rate in developing countries, has organized investigations in nine different countries of different aspects of breast feeding and breast milk with the ultimate aim of formulating programmes of intervention. The basic epidemiological study on 24000 mother/child pairs is just completed and some preliminary data are reported on the pattern of breast feeding in the three studied socio-economic groups--urban elite, urban poor and traditional rural--which differ significantly in their breast feeding rate as well as in the pattern of return of menstruation in breast-feeding and non-breast-feeding mothers.
mesh_terms: D001942:Breast Feeding; D003906:Developing Countries; D005260:Female; D006166:Guatemala; D006801:Humans; D007231:Infant, Newborn; D008598:Menstruation; D008895:Milk, Human; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D013548:Sweden; D013997:Time Factors; D014944:World Health Organization