Extant sociological theories of gendered power within marriage focus on how social forces—such as gender inequality—shape women’s power within already established partnerships and subsequently affect their risk of intimate partner violence. Yet, inequitable social forces similarly shape women’s life conditions prior to and during the marital transition, with implications for women’s power in marriage. In Myanmar, gender relations between women and men historically have been touted as equitable and advantageous to women. Rare qualitative data find that structural gender inequalities permeate Myanmar society, and intersect with other social forces, to constrain women’s marital power. In particular, we argue that women’s transition into marriage is a critical period to assess how gendered social inequalities determine the future distribution of power within marital relationships. These premarital social processes result in a "preconditioning" of relationship dynamics from the onset of marriage, with long-term effects on women’s power within the relationship, and subsequent exposure to intimate partner violence (IPV). We encourage sociological work on gendered power in the family to systematically consider women’s premarital social conditions as predictors of women’s relative power in marriage, with implications for their health and well-being.