A bluish cervix observed during early pregnancy is referred to as which sign?

A bluish discoloration of the cervix observed during early pregnancy is known as Chadwick's sign. This sign results from increased blood flow and vascularity to the pelvic area as part of the physiological changes that occur in preparation for pregnancy. It is often one of the early noticeable signs that healthcare providers look for when assessing a patient for potential pregnancy. The presence of Chadwick’s sign can be particularly helpful in diagnosing pregnancy, especially in the early weeks before other signs or symptoms are present.

In addition, while Goodell's sign refers to the softening of the cervical tissue, Hegar's sign denotes softening of the lower uterine segment, and McDonald's sign indicates the ability to easily flex the body of the uterus against the cervix, these signs are not characterized by the bluish discoloration that is specifically associated with Chadwick's sign.