Background: To evaluate the care given using Roy’s Adaptation Model. Materials and Methods: A pretest-posttest experimental model with a control group. Study population comprised postpartum women (N = 134; 65 in the experimental group, 69 in the control group) who had caesarean full-term delivery in a Turkish maternity hospital between September 2009 and February 2011. Data were collected from the experimental group during seven home visits and from the control group at the end of the 6th week postpartum. Results: Percentage, chi-square, arithmetic mean, standard deviation, and the McNamer test were used to evaluate data establishing 36 nursing diagnoses: Physiological requirements (22), Self requirements (7), Role Function requirements (4), and Interdependence Mode requirements (3). It was determined that the care given during the postpartum period using Roy’s Adaptation Model resolved or prevented the majority of postpartum problems. The difference between most diagnoses was found to be statistically significant (p < 0.05; p < 0.001) during the last week of data collection. Conclusion: The care given in the postpartum period using Roy’s Adaptation Model resolved or prevented postpartum problems.