Cut off value of length of cervix at 24 weeks of gestation for prediction of preterm delivery is
Diagnosis of preterm labor : Regular uterine contractions with or without pain Dilatation more than 2cm and 80% effacement of cervix Length of the cervix <2.5 cm and funnelling of internal os Pelvic pressure, backache ,vaginal discharge Ref: Dutta Obs 9e pg 294.
0.5 cm
1.5 cm
2.5 cm
3.5 cm
Abnormal labor