This is a prospective study where pregnant women between 16-24 weeks gestation attending the Antenatal Clinic, Fetomaternal clinic or Obstetrics & Gynaecology Admission Centre (OGAC) at Hospital Serdang or Hospital Pengajar UPM will be recruited. BMI will be taken both during booking of pregnancy and at recruitment. Cervical length will be measured via transvaginal scan at recruitment time. We aim to assess the association between body mass index, cervical length and risk of preterm birth.

General Objective To assess the association between body mass index, cervical length and risk of preterm birth.

Specific Objectives

1. To examine the relationship between body mass index and cervical length
2. To identify cut-off value of cervical length leading to high risk of spontaneous preterm birth among Malaysian women
3. To assess the association between different cervical length and preterm birth
4. To examine the association between body mass index and preterm birth
5. To develop an individualised screening tool for assessing risk of preterm birth

Inclusion Criteria:

1. Singleton pregnancy between 16-24 weeks gestation
2. No history of previous spontaneous preterm birth (gestation between 24-36+6 weeks)
3. Agreement to follow up and consented for the study

Exclusion Criteria:

1. Major fetal anomaly
2. Multiple pregnancy
3. Uterine anatomic malformation
4. Those require iatrogenic preterm delivery due to various condition

Antenatal women between 16-24 weeks gestation attending the Antenatal Clinic, Fetomaternal clinic or Obstetrics & Gynaecology Admission Centre (OGAC) at Hospital Serdang or Hospital Pengajar UPM