Introduction:
The present study was conducted to examine the effects of the Mindfulness-Based Stress Reduction (MBSR) Program on stress, anxiety, and prenatal attachment of the high-risk pregnant women.

Material and Methods:
This randomized controlled study was conducted with 94 high-risk pregnant women (48 participants in the experimental group, 46 participants in the control group) who were registered at the 15th Family Health Center in a city center in the Southeastern Anatolia Region of Turkey and diagnosed with high-risk pregnancies and reported to the Healthy Living Center. In the study, a total of eight sessions of the mindfulness-based stress reduction program were applied to the pregnant women in the experimental group for one month, each week, and two sessions per week. Data of the study was collected with “Prenatal Distress Questionnaire-Revised (NuPDQ)”, “Pregnancy-Related Anxiety Questionnaire-Revised 2 (PRAQR2)” and “Prenatal Attachment Inventory (PAI)”. Descriptive statistics, chi-square test, t-test for independent and dependent samples were used in the analysis of the data.

Results:
After the intervention, it was determined that the NuPDQ total mean score was 9.52±7.39 in the experimental group and 21.87±4.09 in the control group; the post-test PRAQR2 total mean score was 22.96±8.94 in the experimental group and 37.11±4.38 in the control group; the post-test PAI total mean score was 54.65±8.33 in the experimental group and 43.83±7.71 in the control group. After the intervention, the PRAQR2 total mean score in the experimental group was significantly lower than that in the control group. In addition, the PAI total mean score in the experimental group was significantly higher than that in the control group (p<0.05). However, there was no significant difference between the groups in the NuPDQ total mean score (p>0.05).

Conclusions:
It was determined that the MBSR program applied to high-risk pregnant women decreased the anxiety levels, increased the prenatal attachment levels, and did not affect their stress levels of the pregnant women. Health professionals may consider the MBSR program for high-risk pregnant women as a means by which to improve their pregnant outcomes.