title: Pigmentary demarcation lines during pregnancy.
abstract: Five patterns of natural pigmentary demarcation lines have been described, occurring most frequently in dark-skinned persons. We report the appearance of these lines on the lower limbs of four Puerto Rican women during pregnancy; the lines faded postpartum. Our findings document group B pigmentary demarcation lines that can completely regress postpartum as another less frequently recognized physiologic change of pregnancy.
mesh_terms: D000328:Adult; D001706:Biopsy; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000502:physiology*; D012867:Skin / Q000166:cytology; D012880:Skin Pigmentation