The criteria for determining suspected novel coronavirus infection in pregnant women are the same as those for non-pregnant women, with any one of the epidemiologic histories meeting any two of the clinical manifestations. Epidemiologic history: 1. history of travel or residence in Wuhan area or other areas with persistent local case transmission within 14 days prior to onset; 2. contact with patients with fever or respiratory symptoms from Wuhan or other areas with persistent local case transmission within 14 days prior to onset; 3. clustered illness or epidemiologic association with novel coronavirus infected individuals. Clinical manifestations: 1. fever; 2. imaging features of novel coronavirus pneumonia; 3. normal or reduced total white blood cell count or reduced lymphocyte count early in the onset.