Pregnancy loss due to miscarriage is a pervasive health issue. Although talking about the miscarriage experience with friends and family members has been linked to better adjustment, revealing this loss can be difficult because discussing a miscarriage often makes people uncomfortable. Moreover, couples often manage this information jointly as they decide whether to share the miscarriage with people outside the dyad. We conducted in-depth interviews with couples to explore the nature of co-ownership in the miscarriage context and to identify the privacy rules that couples develop to manage this information. We found that couples frame miscarriage as a shared but distinct experience and that both members exert rights of ownership over the information. Couples' privacy rules centered on issues of social support and others' need to know about the loss. Even though couples described their privacy rules as implicitly understood, they also recalled having explicit conversations to develop rules. We discuss how the management of co-owned information can improve communication and maintain relationships.