What Is Pre-term Labour?
Pre-term labour refers to labour that begins before the pregnancy reaches term. Pre-term birth can occur for different reasons, and some pregnancies may have identifiable risk factors while others may not.
Early identification of women at increased risk can allow closer monitoring and, when appropriate, preventive or specialist management.
What Is Pre-term Labour Screening?
Pre-term labour screening is an assessment designed to identify pregnancies that may have an increased likelihood of spontaneous pre-term birth.
The assessment may include medical history, previous pregnancy outcomes, symptoms, maternal examination and ultrasound measurement of cervical length. In selected symptomatic pregnancies, additional laboratory tests may also be considered.
Why Is Pre-term Birth Screening Important?
Pre-term birth can be associated with increased neonatal health risks, particularly when birth occurs very early in pregnancy. Screening and appropriate surveillance can help identify pregnancies that may benefit from closer observation.
Screening does not predict every pre-term birth, but cervical assessment and other clinical information can help healthcare professionals evaluate risk and plan appropriate care.
Cervical Length Assessment
Measurement of cervical length by ultrasound is an important component of pre-term birth risk assessment. A shorter cervical length during the second trimester is associated with an increased risk of spontaneous pre-term birth.
When appropriate, transvaginal ultrasound can provide a standardized and reproducible assessment of the cervix. ISUOG guidance recommends cervical-length assessment during the second-trimester scan when feasible.
How Is Cervical Length Measured?
Cervical length is commonly measured using transvaginal ultrasound. A specialized ultrasound probe is gently placed in the vagina to obtain a clear view of the cervix and measure its length.
The examination is generally brief and provides detailed information about the cervical canal and internal cervical opening. Proper technique is important to obtain a reliable measurement.
When Is Pre-term Labour Screening Done?
Cervical-length screening is commonly performed during the mid-trimester ultrasound assessment. The exact timing and need for repeated measurements depend on the pregnancy history and individual risk factors.
Women with a previous spontaneous pre-term birth or other risk factors may require a more individualized cervical surveillance plan.
Who May Have a Higher Risk of Pre-term Birth?
Several factors may be associated with an increased risk of pre-term birth. These can include:
• Previous spontaneous pre-term birth
• A short cervix during pregnancy
• Previous cervical procedures or cervical surgery
• Multiple pregnancy, such as twins
• Certain uterine or cervical abnormalities
• Some infections and pregnancy complications
• Symptoms suggestive of pre-term labour
Having a risk factor does not mean that pre-term birth will definitely occur. Risk should be assessed individually by the treating obstetrician or fetal medicine specialist.
Previous Pre-term Birth and Screening
A previous spontaneous pre-term birth is an important part of pregnancy history when assessing the risk of recurrence.
Women with a previous pre-term birth may benefit from an individualized plan that can include cervical-length surveillance and other preventive strategies when clinically appropriate. A previous pre-term birth increases risk but does not mean that another pre-term birth is certain.
What Is a Short Cervix?
A short cervix refers to a cervical length that is shorter than the expected measurement for the particular stage of pregnancy. Cervical shortening can be associated with an increased risk of spontaneous pre-term birth.
The significance of a short cervix depends on factors such as gestational age, whether the pregnancy is singleton or multiple, previous pregnancy history and the presence or absence of symptoms.
Pre-term Labour Screening in Women Without Symptoms
Some women at risk of pre-term birth have no symptoms. This is why cervical-length assessment during the mid-trimester ultrasound can be useful as part of appropriate screening.
A normal cervical measurement can provide reassuring information, while a shortened cervix may lead to closer monitoring or consideration of preventive treatment depending on the individual circumstances.
Pre-term Labour Screening When Symptoms Are Present
Women experiencing regular contractions, pelvic pressure, vaginal bleeding, increased vaginal discharge or suspected leakage of fluid should contact their obstetrician or maternity service promptly.
In women with symptoms of threatened pre-term labour, transvaginal cervical-length measurement can be used together with clinical assessment. In selected situations, biochemical tests such as fetal fibronectin or other validated tests may also contribute to risk assessment.
Cervical Length and Preventive Care
If a short cervix is identified, the appropriate management depends on gestational age, previous pregnancy history, symptoms and other clinical findings.
Depending on the individual situation, preventive options may include vaginal progesterone or cervical cerclage. These treatments are not suitable for every woman and should only be considered after specialist assessment.
Pre-term Labour Screening in Twin Pregnancy
Multiple pregnancy, including twin pregnancy, carries a higher risk of pre-term birth. The assessment and monitoring plan may therefore differ from that used in singleton pregnancy.
Cervical-length assessment can provide useful information in selected twin pregnancies, but interpretation should take into account the type of multiple pregnancy and the overall clinical picture.
Pre-term Labour Screening and Ultrasound
Ultrasound plays an important role in the assessment of pre-term birth risk. In addition to cervical length, pregnancy ultrasound can evaluate fetal growth, amniotic fluid and other findings that may be relevant to maternal and fetal care.
Cervical-length measurement is one part of a broader assessment and should not be interpreted as the only factor determining whether pre-term birth will occur.
Can Pre-term Birth Always Be Predicted?
No screening test can predict every pre-term birth. Some women who have no obvious risk factors may still deliver early, while many women with recognized risk factors continue their pregnancy to term.
Screening is intended to identify increased risk and provide information that may support appropriate monitoring and management rather than guarantee a particular pregnancy outcome.
Specialist Pre-term Birth Risk Assessment
A fetal medicine specialist can review previous pregnancy history, current symptoms, cervical length, ultrasound findings and other relevant factors to develop an individualized assessment plan.
Early specialist evaluation can be particularly useful for women with a previous pre-term birth, short cervix, multiple pregnancy or symptoms suggestive of pre-term labour.
Pre-term Labour Screening in Jalandhar
Promise Fetal Medicine & Pregnancy Scan Centre in Jalandhar provides specialist fetal medicine and pregnancy ultrasound services, including assessment of cervical length and evaluation of risk factors associated with pre-term birth.
Our approach focuses on individualized assessment using appropriate ultrasound evaluation, pregnancy history and clinical information to support careful monitoring throughout pregnancy.
Book a Pre-term Labour Screening Consultation
If you have previously experienced pre-term birth, have been told that your cervix is short, are carrying twins, or have concerns about your risk of early delivery, specialist fetal medicine assessment can help determine the appropriate screening and monitoring plan.
Contact Promise Fetal Medicine & Pregnancy Scan Centre in Jalandhar for pre-term labour screening, cervical-length assessment and specialist fetal medicine consultation.
