A rare pregnancy-associated autoimmune skin disease that is characterized by an itchy rash that develops into blisters. It is most common during the second and third trimesters of pregnancy. It was previously known as herpes gestationis although it has no association with the herpes virus whatsoever. The disease is Monarch Disease Ontology id MONDO_0006558 (pemphigoid gestationis). Also known as: Herpes gestationis, Herpes gestationis (disorder), Herpes gestationis NOS (disorder), Herpes gestationis unspecified (disorder), gestational herpes, gestational pemphigoid.