(Jama 2000;284:350)
previously dermatitis or herpes gestationis

Si:Vesicles and bullae with onset any time during pregnancy; may flare at delivery

Recurs in subsequent pregnancies

Premature delivery sometimes

Lab:

Path:Biopsy shows specific subepidermal vesicles with polys early, then eosinophiles; C₃ deposition on epidermal basement membrane from low titer pemphigoid type IgG auto-antibodies