A Cochrane systematic review examined the effectiveness of support for breastfeeding mothers. The review which included 34 trials and in excess of 29,000 mothers concluded that additional professional or lay support was effective in prolonging any breastfeeding, but its effects on exclusive breastfeeding were less clear.

WHO/UNICEF training courses appeared to be effective for professional training. Further trials are required to assess the effectiveness (including cost-effectiveness) of both lay and professional support in different settings, particularly those with low rates of breastfeeding initiation, and for women who wish to breastfeed for longer than three months.

C Britton, F McCormick, M Renfrew, A Wade, S King. Support for breastfeeding mothers. Cochrane Database Systematic Review 1 Jan 2007: p. CD001141