Introduction:

Breast milk is the best life insurance for children under six months, but those fed exclusively with this milk do not reach 40 %, a reason to promote breastfeeding.

Objective:

To evaluate the effect of nursing care based on Kristen Swanson's theory on the knowledge and acceptance of the practice of breastfeeding in first-time mothers.

Methods:

Quasi-experimental research, with pre-test, post-test, in the maternity service and joint accommodation of the Augusto Hernández Mendoza-ESSALUD-ICA hospital, Peru, during 2016. Universe 30 primiparas. Iinformation obtained from the variables of nursing care, level of knowledge and acceptance of breastfeeding practice, with a survey and checklist, the intervention consisted of applying nursing care based on the Kristen Swanson Model to mothers. The information was processed with distributions of absolute frequencies, percentage, mean, standard deviation, variance, minimum and maximum value, the association between variables was obtained with the non-parametric tests of Wilcoxon and McNemar. with decision rule: If p≤0.05, Ho is rejected.

Results:

Mothers' knowledge of breastfeeding changed between measurements before and after the intervention (z = -5.203, p < 0.05). The proportion of mothers who do not accept breastfeeding decreased from 30.00 % in the measurement before to 6.66 % after the intervention.

Conclusion:

The application of nursing care based on the model of Kristen Swanson was effective in improving the knowledge and acceptance of the practice of breastfeeding in the first-time mothers studied.

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