Platformed sociality has become an elemental part of existential processes and struggles. Previous research has shown that digital contexts offer lifelines of support and a sense of belonging based on shared vulnerabilities. By combining phenomenological and ethnographic approaches, this article explores involuntary childlessness (IC) online in so-called trying-to-conceive (TTC) contexts on Instagram and in blogs. The analysis is driven by the following questions: What are the particularities of digital lifeline communication in the context of IC? Can lifeline communication shape what is coming into being in the context of wished-for children and/or motherhood? Can (digital) life be challenged, extended, or created in this context? Drawing on interviews and online posts from 260 Instagram accounts and three blogs, I argue that digital lifeline communication in TTC environments facilitates digital existence and “digital life” as the notions of motherhood and longed-for and lost children attain a form of digital materiality through posts and discussions.