en Midwifery Original Article <div style="text-align: justify;"><span style="font-size:12px;"><span style="font-family:Times New Roman;"><b>Background:</b> Declining fertility and childbearing are significant public health concerns. The Multi-Theory Model (MTM), which addresses both the initiation and maintenance of behavior, may provide a useful framework for promoting childbearing intentions.However, no validated theory based instrument currently exists to measure MTM constructs in this context. Therefore, this study aimed to develop and validate a Persian questionnaire based on MTM to assess childbearing intentions among women of reproductive age.<br> <b>Methods:</b> A cross-sectional descriptive survey was conducted in 2025 with 275 married women recruited from comprehensive health centers in Yazd, Iran. Women with only one child and willing to participate from the selected health centers were included in this study. An initial 37-item researcher-developed instrument based on MTM was refined through expert evaluation (CVR, CVI) and quantitative face validity (impact score). Construct validity was assessed via confirmatory factor analysis (CFA), and reliability evaluated usingvia Cronbach&rsquo;s alpha and test&ndash;retest ICC analyzed with SPSS 22 and AMOS21.<br> <b>Results:</b> During the psychometric validation process, four items were removed. The final questionnaire with 33-items demonstrated high reliability (Cronbach&rsquo;s &alpha; = 0.93; construct-level &alpha; = 0.71&ndash;0.92; test&ndash;retest ICC =0.81 (95% CI: 0.68&ndash;0.90)) and acceptable construct validity (CFA: CFI =0.932, TLI =0.921, RMSEA = 0.06, &chi;&sup2;/df =1.97). Content validity was strong, with CVR ranging from 0.62&ndash;1, S-CVI/Ave =0.929, and overall CVI =0.91. All items also showed acceptable face validity (impact score >1.5).<br> <b>Conclusion</b>: The validated MTM-based Persian childbearing intention questionnaire is a reliable and valid tool for assessing childbearing intentions among women with only one child. It can guide public health research, educational interventions, and policy planning to support informed reproductive decisions.</span></span></div> Fertility, Intention, Reproductive Behavior, Reproductive Health, Psychometrics, Multi-Theory Model, Validation 0 0 http://nmj.goums.ac.ir/browse.php?a_code=A-10-1466-3&slc_lang=en&sid=1 Tayebeh Mokhtari Sorkhani arianmokhtari2@gmail.com 100319475328460017525 100319475328460017525 No Social Determinants of Health Research Center, Non-Communicable Diseases Research Institute, Department of Health Education and Health Promotion, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Seyed Saeed Mazloomy Mahmoodabad Mazloomy.mm@gmail.com 100319475328460017526 100319475328460017526 No Social Determinants of Health Research Center, Non-Communicable Diseases Research Institute, Department of Health Education and Health Promotion, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Mahshid Bokaie mah_bokaie@yahoo.com 100319475328460017527 100319475328460017527 No Research Center for Nursing and Midwifery Care, Comprehensive Research Institute for Maternal and Child Health, Department of Midwifery, School of Nursing and Midwifery, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Manoj Sharma manoj.sharma@unlv.edu 100319475328460017528 100319475328460017528 No Department of Social and Behavioral Health, School of Public Health, University of Nevada, Las Vegas, United States of America; Department of Internal Medicine, Kirk Kerkorian School of Medicine at UNLV, Las Vegas, United States of America Farzan Madadizadeh statlearningeasy@gmail.com 100319475328460017529 100319475328460017529 Yes Medical Informatics Research Center, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran