Women’s lives in British North America and the early United States were fundamentally shaped by the experiences of childbearing and childrearing and by the ideologies of motherhood that emerged from a range of cultural contexts. Most women in this period became mothers, either through choice or coercion, but their experiences of childbearing and motherhood differed sharply depending on their cultural background, social status, and experience of freedom or bondage. The history of motherhood was marked by significant continuities as well as change over time. For most women, motherhood was fundamentally defined by the physical rigors of pregnancy, childbirth, and breastfeeding, and these experiences remained central across generations. Motherhood comprised a range of roles, activities, and areas of expertise, and as a result many women enjoyed considerable authority as mothers within their families and communities; this too remained constant. Changes to childbearing, motherhood, and maternal ideology occurred gradually and unevenly and affected women from different backgrounds in distinct ways. The incursions of European settler colonialism and the later expansion of the new United States, for instance, brought growing instability to Native American communities and threatened to undermine Native women’s power as mothers, though they formulated strategic responses to preserve their authority. The second half of the 18th century saw changes to women’s experiences and to feminine ideology in Anglo-American society. Middle-class and elite White women precipitated a fertility revolution that resulted in steadily declining family size; in contrast, enslaved women of African descent generally experienced increasing rates of fertility in the 18th century, and their childbearing experiences were shaped by the commodification of their reproductive labor. At the same time, a gradual transition began in the realm of childbirth as some middle-class and elite white women called on male physicians to manage their births. Meanwhile, this same era also saw a significant ideological shift as motherhood gained new significance in Anglo-American culture, making the image of the ideal white mother the most potent symbol of feminine virtue and influence.