Feature ArticlesMothers' Adaptation to a Late Preterm Infant When BreastfeedingGerhardsson, Emma MNSc, RN; Rosenblad, Andreas PhD; Mattsson, Elisabet PhD, RN, RM; Funkquist, Eva-Lotta PhD, RN, RMAuthor Information Departments of Women's and Children's Health (Ms Gerhardsson and Drs Mattsson and Funkquist) and Medical Sciences, Clinical Diabetology and Metabolism (Dr Rosenblad), Uppsala University, Uppsala, Sweden; and Department of Statistics, Stockholm University, Stockholm, Sweden (Dr Rosenblad). Corresponding Author: Emma Gerhardsson, MNSc, RN, Department of Women's and Children's Health, Uppsala University, SE-751 85 Uppsala, Sweden ([email protected]). Disclosure: The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article.Each author has indicated that he or she has met the journal's requirements for Authorship.Submitted for publication: May 1, 2019; accepted for publication: November 12, 2019. The Journal of Perinatal & Neonatal Nursing: January/March 2020 - Volume 34 - Issue 1 - p 88-95 doi: 10.1097/JPN.0000000000000463 Buy Metrics Abstract The aim of this study was to psychometrically test the Adaptation to the Late Preterm Infant when Breastfeeding Scale (ALPIBS) and also to test how a mother's self-efficacy predicts adaptation to a late preterm infant when breastfeeding. This study had a longitudinal and prospective design, and data collection was consecutive. Mothers (n = 105) with infants born between 34 0/7 and 36 6/7 weeks were recruited from a neonatal intensive care unit or a maternity unit. The ALPIBS was developed using exploratory factor analysis, and the association between breastfeeding self-efficacy and ALPIBS score was examined using linear regression analysis. The Breastfeeding Self-Efficacy Scale–Short Form instrument was used to measure self-efficacy in breastfeeding. A higher degree of self-efficacy was significantly associated with a higher degree of adaptation to the late preterm infant's breastfeeding behavior (P < .001). We identified 4 separate underlying factors measured by 11 items in the ALPIBS: (A) breastfeeding is a stressful event; (B) the infant should breastfeed as often as he or she wants; (C) a mother has to breastfeed to be a good mother; and (D) it is important to ensure control over the infant's feeding behavior. There is a link between self-efficacy and ALPIBS score, and self-efficacy is a modifiable factor that influences breastfeeding. © 2020 Wolters Kluwer Health, Inc. All rights reserved.