What are Chadwick's sign and Hegar's sign classified as in pregnancy?

Chadwick's sign and Hegar's sign are classified as positive pregnancy signs. These signs indicate physiological changes that suggest the presence of pregnancy.

Chadwick's sign refers to the bluish discoloration of the cervix, vagina, and labia that occurs due to increased blood flow to the pelvic region during pregnancy. This change is typically noticeable around six to eight weeks of gestation.

Hegar's sign occurs when the lower segment of the uterus becomes soft and compressible, which can be detected on physical examination around the same early gestational period.

Both signs are compelling indicators of pregnancy because they rely on physical findings directly associated with the physiological changes that occur when a woman is pregnant, differentiating them from other types of signs that may not be as definitive or closely tied to pregnancy itself.