Medical devices are moving out of the clinic and into the home. The design of these devices shapes our experience of interacting with our bodies. We attend to ovulation tracking devices that aid conception. We present Ovum; a research product that will be deployed in a long-term, qualitative study with couples trying to conceive. The contributions of this pictorial are the framing of the design space around at-home ovulation tracking devices and the presentation of our approach to this design space through working with oppositional experiential qualities by designing for fertility tracking as a shared, domestic and do-it-yourself experience.