The anti-clockwise spiralization of the linea nigra sign.
Eduarda Ribeiro Dos SantosMarina ZamunerAndrea Maria Novaes MachadoCristina Tiemi AmadatsuAdolfo Wenjaw LiaoPublished in: Einstein (Sao Paulo, Brazil) (2020)
The analysis of supra- and infraumbilical linea nigra in puerperal women showed a predominance of what the authors named "anti-clockwise spiralization of the linea nigra sign".