Atopic dermatitis (AD) is a common inflammatory skin disease affecting 5-8% of adults, with many being of reproductive age and potentially experiencing AD- and treatment-related challenges during family planning and pregnancy (FPP). This study examined whether patients with AD receive FPP-related information from their dermatologist and their concerns about pregnancy and breastfeeding. A cross-sectional questionnaire study was conducted among 18-45-year-old patients with AD treated at dermatology departments in university hospitals or private dermatology clinics in Denmark, all undergoing either topical or systemic treatment. A total of 121 patients participated in the study. The most pronounced concern was the heritable nature of AD (88.4%), followed by concerns about the teratogenicity of their treatments (29.8%). Additionally, 37.1% of women expressed concern about their ability to breastfeed. One-third of patients with AD had discussed FPP with their dermatologists prior to pregnancy, and 15% reported having fewer biological children than they desired due to their disease. Adult patients with AD have significant unmet informational needs regarding FPP. Addressing these concerns at appropriate stages in their lives, potentially through structured communication, could provide patients with better opportunities to address their concerns and plan their family life based on comprehensive and accurate information.