The 19-item Body Understanding Measure for Pregnancy scale (BUMPs; Kirk & Preston 2019) assesses body dissatisfaction during pregnancy. The BUMPs can be administered online and/or in-person to pregnant individuals and is free to use in any setting. This chapter first discusses the development of the BUMPs and then provides evidence of its psychometric validation. The BUMPs was developed using exploratory and confirmatory factor analyses which revealed a 3-factor structure with latent variables relating to (dis)satisfaction with appearing pregnant, concerns about weight gain, and physical burdens of pregnancy. The BUMPs is also found to be invariant across all three trimesters of pregnancy and therefore appropriate for use at all stages of pregnancy. Internal consistency reliability, test-retest reliability, convergent validity, discriminant validity, and incremental validity support the use of the BUMPs. Next, this chapter provides the BUMPs items in their entirety, instructions for administering the BUMPs to participants, the item response scale, and the scoring procedure. Information concerning a retrospective version of the BUMPs and current known translations is included. Logistics of use, such as permissions, copyright, and contact information, are provided for readers.