Ladin's sign is a clinical sign of pregnancy in which there is softening in the midline of the uterus anteriorly at the junction of the uterus and cervix. It occurs and is detectable with a manual examination at about 6 weeks' gestation.[1] Ladin's sign is often present during the woman's first pelvic exam when pregnancy is suspected.[2] Cervical length is also significant in pregnancy and shorter or shortening length can increase chances of preterm labour and delivery as this shortening happens naturally at the beginning of labour.[3] The cervix softens from conception and combined with other signs of early pregnancy, detecting Ladin's sign can assist clinicians in verifying a diagnosis of pregnancy.[4]
Abnormal softening of the cervix can also occur in pregnancy, so testing for abnormalities of uterine cervical softening, including sheer wave speed measurement, can be used as a method of distinguishing between normal and abnormal softening.[5]
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