Purpose: This research administrated with the goal of studying the trend of changes in marital satisfaction, sexual satisfaction and subjective well-being in the first 5 years of marital life. Method: So, 200 married women of Sari City aged 40-16 years were selected using convenience sampling. They answered to the scales The Index of Sexual Satisfaction-short‐form, Relationship Assessment scale, Satisfaction with Life Scale, and Oxford Happiness Questionnaire-short form. Results: The results indicated that marital satisfaction and sexual satisfaction decreased by linear trend in the first five years of married life, while life satisfaction and happiness decreased by quadratic nonlinear in the first three years of marital life of women, then gradually increases. Conclusion: Focus on the underlying causes of marital satisfaction and sexual satisfaction can guarantee to increase life satisfaction and happiness and lead to continuation of marriage in later years of the couple's life.

Keywords: marital satisfaction, sexual satisfaction, subjective well-being

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