Chadwick's sign
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Chadwick's sign is a bluish discoloration of the cervix, vagina and vulva caused by venous congestion. It can be observed as early as 6-8 weeks after conception, and is often used as an early sign of pregnancy.
These color changes were discovered in approximately 1836 by French doctor Etienne Joseph Jacquemin (1796-1872).[1]