• Madalen Oribe, Aitana Lertxundi, Mikel Basterrechea, Haizea Begiristain, Loreto Santa Marina, María Villar, Miren Dorronsoro, Pilar Amiano, and Jesús Ibarluzea.
• Instituto de investigación Sanitaria, BIODONOSTIA, San Sebastián, Guipúzcoa, España.
• Gac Sanit. 2015 Jan 1; 29 (1): 4-9.

ObjectiveTo estimate the prevalence of exclusive breastfeeding (EB) during the first 6 months of life in the Gipuzkoa birth cohort, identify the reasons for abandonment of EB, and establish the associated factors.MethodsThe study population consisted of 638 pregnant women from the INMA-Gipuzkoa (Infancia y Medio Ambiente, www.proyectoinma.org) birth cohort, who were followed up from the third trimester of pregnancy until the child was aged 14 months. To determine the factors related to abandonment of EB, logistic regression models were used in two different stages (4 months or early stage and 6 months or late stage).ResultsThe prevalence of EB within the Gipuzkoa cohort was 84.8% after hospital discharge, 53.7% at 4 months of life and 15.4% at 6 months of life. The reasons given by the mothers for early EB cessation were: breastfeeding problems, low weight gain and hypogalactia. Other factors influencing the early phase were the intention to provide EB, parity, area of residence and social class. Abandonment in the late stage was influenced by the length of maternity leave.ConclusionsFrom a public health perspective, the results of this study could help health professionals to develop strategies to support breastfeeding mothers, taking into account the main reasons for early and late abandonment.Copyright © 2014 SESPAS. Published by Elsevier Espana. All rights reserved.

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