[James R. Chadwick, U.S. gynecologist, 1844-1905]
A deep blue-violet color of the cervix and vagina caused by increased vascularity. It is a probable sign of pregnancy that becomes evident around the fourth week of gestation.
Taber’s Cyclopedic Medical Dictionary 24th Edition Online + App from F.A. Davis and Unbound Medicine. Find 75,000 medical and nursing definitions. Download to iPhone, iPad, and Android. Complete Product Information.