Twin & Multiple Pregnancy Management in Singapore
Dr. Chang T.C.
Obstetrician & Gynaecologist Singapore
MBBS London, MD London, FRCS Glasgow, FRCOG UK, FAMS
Finding out you are expecting twins or multiples brings equal measures of joy and uncertainty. Managing a twin pregnancy in Singapore requires a more structured level of care than a singleton pregnancy: closer monitoring, clearer answers, and a plan that accounts for the additional complexity of carrying more than one baby.
Twin and Multiple Pregnancy Care
Carrying twins or multiples is not simply two pregnancies at once. The physiological demands on your body are greater, and the potential for complications is higher than in a singleton pregnancy.
It means that your care plan needs to be more structured, your monitoring more frequent, and your specialist more experienced in managing a complicated pregnancy.
Twin and multiple pregnancy management involves a coordinated approach to antenatal care, ultrasound surveillance, and delivery planning, with the aim of detecting any changes early and giving you confidence at every stage.
Types of Twin Pregnancies
Not all twin pregnancies carry the same level of risk. The key distinction is whether the twins share a placenta, an amniotic sac, or both.
| Twin type | Placenta | Amniotic sac | Risk level |
| Dichorionic diamniotic (DCDA) | Separate (one each) | Separate (one each) | Lower; most common type |
| Monochorionic diamniotic (MCDA) | Shared | Separate | Higher; requires fortnightly surveillance due to TTTS risk |
| Monochorionic monoamniotic (MCMA) | Shared | Shared | Highest; rarest type; close surveillance required in later pregnancy |
Monitoring During a Twin or Multiple Pregnancy
Your pregnancy check-ups in Singapore will look different from those for a singleton pregnancy, primarily in how often you are seen and what each visit involves.
- For dichorionic twins, growth scans are typically every two to four weeks from around 20 weeks.
- For monochorionic twins, scans are recommended at least every two weeks from 16 weeks.
Each assessment will monitor fetal growth, amniotic fluid levels, blood flow through the umbilical and uterine arteries (using Doppler assessment), and fetal wellbeing.
A fetal anomaly scan is also typically performed between 18 and 21 weeks to check for structural abnormalities. You will also have more frequent blood pressure checks and urine tests to screen for preeclampsia (a pregnancy complication characterised by high blood pressure and organ stress), which is more common in multiple pregnancies.
Possible Complications We Monitor For
| Condition | What it means |
| Twin-to-twin transfusion syndrome (TTTS) | An imbalance in shared placental blood flow causes one twin to receive too much blood and the other too little. Research in Translational Pediatrics estimates this affects 10 to 15% of monochorionic twin pregnancies. |
| Selective fetal growth restriction (sFGR) | One twin grows significantly more slowly than the other due to unequal sharing of the placenta. |
| Preeclampsia | High blood pressure and organ involvement. A study of over 929,000 deliveries found that twins carry a three to fourfold higher risk compared to singleton pregnancies. |
| Preterm labour | Multiple pregnancies have a higher rate of delivery before 37 weeks. Close monitoring allows early intervention where possible. |
| Anaemia and nutritional demands | Carrying more than one baby places higher demands on your body’s iron and nutrient stores. |
Early identification is where specialist surveillance makes a meaningful difference. You can read more on the high-risk pregnancy care page.
Planning for Delivery
Delivery planning depends on several factors: the type of twin pregnancy, the position of the babies as term approaches, your obstetric history, and the health of both mother and babies.
NICE guidance on twin and triplet pregnancy recommends planned birth at 36 weeks for uncomplicated MCDA twins and 37 weeks for uncomplicated DCDA twins, as continuing beyond these points generally carries greater risk than early delivery.
A vaginal delivery may be possible if the presenting twin is positioned head-down and both babies are in a suitable condition. A Caesarean section (surgical delivery through an incision in the abdomen and uterus) is more commonly recommended for higher-order multiples and in specific twin presentations.
Further information on delivery options is available on the delivery of babies page.
When to Seek Medical Attention
Contact your doctor promptly if you experience any of the following:
- Vaginal bleeding at any stage
- Sudden or severe abdominal pain
- A noticeable decrease in fetal movements from either baby
- Severe or persistent headaches
- Visual disturbances, including blurred or double vision
- Rapid or significant swelling of the face, hands, or feet
- Signs of preterm labour before 37 weeks, including pelvic pressure, regular contractions, or unusual vaginal discharge
Twin & Multiple Pregnancy Care with Dr TC Chang
Dr TC Chang is a Consultant Obstetrician and Gynaecologist with over 31 years of specialist experience in maternal-fetal medicine. He is the Head of the Fetal Assessment Unit at Thomson Medical Centre, with a particular focus in twin pregnancy management and high-risk obstetrics.
To discuss your care plan with an experienced obstetrician in Singapore, book a consultation with Dr TC Chang.
Frequently Asked Questions
Are all twin pregnancies considered high risk?
How early can you tell whether twins share a placenta?
Chorionicity is best determined by ultrasound between 11 and 14 weeks. ISUOG Practice Guidelines confirm that accuracy is highest at this stage, before the amnion and chorion fuse, and decreases as the pregnancy progresses. You can read more about first-trimester screening options, including the OSCAR and NIPT tests, on the Dr Chang website.
How often will I need scans if I am pregnant with twins?
This depends on chorionicity. For dichorionic twins, growth scans are typically offered every two to four weeks from around 20 weeks. For monochorionic twins, fortnightly ultrasound is generally recommended from 16 weeks. Both types also have an early scan between 11 and 14 weeks to confirm chorionicity and establish your care plan.
What is twin-to-twin transfusion syndrome (TTTS)?
Can twins be delivered naturally?
Will I need a Caesarean section if I am having twins?
Not necessarily, though Caesarean sections are more common in twin pregnancies. The decision depends on the position of the babies, the type of twin pregnancy, your obstetric history, and the overall clinical picture.
When should I see a high-risk pregnancy obstetrician for twins?
As early as possible in your first trimester. Establishing chorionicity at an early scan allows your care plan to be put in place promptly. If you have already had a first scan confirming twins, booking a consultation with a specialist soon after is advisable.
Carrying twins or multiples benefits from experienced, attentive care. Dr TC Chang’s background in maternal-fetal medicine and obstetric ultrasound means your pregnancy is closely watched at every stage, with a plan adjusted as your needs change. There is no obligation at a first consultation.