Study Population and Sample
Population:
The study population will consist of adolescent pregnant individuals registered at Family Health Centers in Şanlıurfa, Turkey.
Sample:
The sample size and power calculation were performed using the G\*Power 3.1.9.4 program. The study sample size was determined using breastfeeding self-efficacy data from previous research, and the required number of participants was calculated as a total of 90, with at least 45 participants in each group. The Type I error rate was set at 0.05, and the effect size was determined as 0.6039, based on the means and standard deviations between groups. The power analysis result was 0.80.
Study Design
Randomization:
Block randomization will be used to assign participants to intervention and control groups. Complete randomization will be performed through https://www.randomizer.org. Two computer-generated randomization sequences will be applied in a one-to-one manner.
Intervention Group During the prenatal period, breastfeeding education based on the Breastfeeding Self-Efficacy Theory will be provided, and any questions from participants will be answered. According to the theory, a mother's breastfeeding self-efficacy is influenced by four key variables: previous breastfeeding experiences, observational learning from others, social support, and psychological state.
Following the education session, weekly reminder and motivational text messages related to breastfeeding will be sent until delivery.
In the first postpartum week, a home visit will be conducted for counseling, addressing any concerns, and collecting data.
During postpartum weeks 2, 3, and 4, participants will receive telephone counseling, and final data collection will occur in the 4th week.
Control Group Adolescent pregnant individuals who visit the Family Health Center will have their baseline data collected but will not receive any intervention.
They will continue to receive routine perinatal education. Final data will be collected via telephone in the 4th postpartum week. Data Collection Tools Personal Information Form Postpartum Mother Information Form I and II Breastfeeding Attitude Evaluation Scale Antenatal Breastfeeding Self-Efficacy Scale - Short Form Postpartum Breastfeeding Self-Efficacy Scale - Short Form Quality Assurance Measures Data Validation and Monitoring: Data entry will be controlled according to predefined rules, and inconsistencies will be corrected.
Source Data Verification: Participant data will be cross-checked with medical records and other reliable sources.
Standard Operating Procedures (SOPs): Standardized procedures will be established for patient registration, data collection, analysis, and adverse event reporting.
Ethical Considerations Ethical approval and institutional permissions were obtained from the Harran University Clinical Research Ethics Committee and the Şanlıurfa Provincial Health Directorate. The study will be conducted with pregnant individuals who voluntarily agree to participate. Written and verbal informed consent will be obtained from all participants, who will have the right to withdraw from the study at any time.
