This study establishes the relationship between cervical length and whether it can be used to predict haemorrhage and preterm delivery in cases of placenta previa.

Some studies have reported an association between ultrasonographic decreased cervical length and the likelihood of complications as antepartum or post-partum haemorrhage requiring an emergency caesarean section (CS) .

The safety of trans-vaginal scanning is not in doubt, and the technique now has widespread acceptance. As a consequence, the clinical presentation of placenta previa has changed and most low lying placentas are diagnosed during the second trimester anomaly scan.

The objective of this study was to establish if there is a relation between transvaginal ultrasonographic measurement of cervical length in cases of placenta previa and whether it can be used as a predictor for antepartum haemorrhage or not.

Inclusion Criteria:

1. Age: 20-45 years old
2. Single Pregnancy
3. Fetal gestational age 28 to < 36 weeks
4. Normal amniotic fluid index (AFI)
5. Diagnosis of placenta previa by pelvic ultrasound that was confirmed when the lower placental edge overlies the internal cervical os on transvaginal ultrasound (TVS).

Exclusion Criteria:

1. Threatened preterm labor and maternal use of vaginal progesterone.
2. Preterm premature rupture of membranes;
3. Polyhydramnios;
4. Presence of cercelage and history of cervical cone biopsy which both affect cervical length.
5. Diagnosis of multiple fetal anomalies;
6. Women with other risk factors for intra-partum hemorrhage

Healthy pregnant females aged between 25-40 years