Monarch Disease Ontology term MONDO_0009315 (congenital factor XII deficiency) is an autosomal recessive systemic dysfunction of the hemostatic pathway, that is due to a defect in the coagulation factor XII (FXII or Hageman factor), and is either asymptomatic or characterized by a prolonged activated partial thromboplastin time and an increased risk for thromboembolism. FXII deficiency is strongly associated with primary recurrent abortions. Also known as: Factor XII Deficiency, Hageman Factor deficiency, congenital Hageman factor deficiency, deficiency, Hageman, factor XII deficiency disease.