Goodell's sign
In medicine, Goodell's sign is an indication of pregnancy. It is a significant softening of the vaginal portion of the cervix from increased vascularization. This vascularization is a result of hypertrophy and engorgement of the vessels below the growing uterus. This sign occurs at approximately six  weeks' gestation. The sign is named after William Goodell (1829–1874). See also
 Chadwick's sign
 Hegar's sign
 Ladin's sign

References

Medical signs
Obstetrics
Midwifery