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compressibility and softening of the lower uterine segment, a probable sign of pregnancy; the lower uterine segment just above the cervix becomes so soft that when compressed between two fingers its wall cannot be felt or feels extremely thin.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Hegar's signSoftening of womb (uterus) due to its increased blood supply, perceptible on gentle finger pressure on the neck (cervix). This is one of the confirmatory signs of pregnancy and is usually obvious by the 16th week.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005