Mørk S, et al. - Using the Danish Medical Birth Register, 1,199,610 singleton pregnancies (1997-2016) were distinguished in order to explain the predominance of Spondyloarthritis (SpA) and subtypes diagnosed former to delivery in a nationwide pregnant population and to determine how SpA was related to adverse pregnancy-related outcomes. Compared with pregnancies in women without SpA, pregnancies in women with SpA were more frequently complicated via adverse pregnancy outcomes. Thus, while consulting females with SpA in their childbearing years, clinicians should be informed about this. Prospective research should concentrate on examining causal relationships and potential interventions directed at preventing these outcomes.