The primary aim of this study was to assess factorial structure of Childbearing Questionnaire (CBQ). Using confirmatory factor analysis, it examined modified 8 -factor models on a sample of 450 couples. Cronbach's alpha coefficients were 0.90 and 0.83 for positive and negative childbearing motivation, respectively, and the intra-class correlation coefficient (ICC) was in the range of 0.81-0.86, which indicated that the reliability of the questionnaire was high. The modified model was found to have ‘adequate” fitness based on Root Mean Square Error of Approximation (RMSEA), but others indicators such as Tucker–Lewis Index (TLI) and Comparative Fit Index (CFI) did not show any 'acceptable’ fitness. In the 8-factor model, three factors with low loading were removed to achieve adequate fitness. Also, 13 correlated error terms were added to the modified model. The confirmatory factor analysis of the modified model showed “adequate” fitness (CFI = 0.91, TLI =0.9, RMSEA = 0.06. and chi-square to degree of freedom ratio (χ2/df) = 3.49). This study supported the use of CBQ as a valid and reliable instrument of childbearing in engaged couples.

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