Herpes gestatioinalis is
Herpes gestationalis (pemphigoid gestationis ) is characterized by eosinophilic degranulation at dermal-epidermal junction. Becomes severe with subsequent pregnancies.
Caused by Herpes virus
Autoimmune reaction to collagen XVII in  basement membrane of skin
Neutrophilic degranulation at dermal - epidermal junction
Less severe in subsequent pregnancies.