Overview
Twins raise the chance of preterm birth, preeclampsia, and gestational diabetes.
Identical twins sharing a placenta need extra monitoring.
Symptoms
Common signs:
- Twins
Less common
- Extra tiredness
- Stronger nausea
Look up a symptom: Pregnant or recently gave birth · Severe vomiting during pregnancy
When to get medical care
Causes
Multiple eggs or splitting.
Does it spread or run in families?
- It isn't contagious. You can't catch it from someone else.
Who is more likely to get it
- IVF
Possible complications
- Preterm labor: Twins are often born early
- Preeclampsia (pregnancy headache, swelling, and high blood pressure): More common
Diagnosis
A clinician asks about your symptoms and may order tests.
The exam
A physical exam.
Tests
Tests, if needed:
- Ultrasounds:
Treatment
Treatment depends on the cause and how severe it is.
Self-care
- Keep all visits
- Rest as advised
Prevention
To lower your risk or prevent problems:
- Prenatal care
Which doctor treats this
- Start with your primary care provider (family doctor or internist).
- They may send you to an OB-GYN or midwife; high-risk pregnancies may see a maternal-fetal medicine doctor.
Children, pregnancy, and older adults
- IVF pregnancies: More likely to be twins.
Outlook
Most twins are born healthy.
Getting ready for your visit
Bring a list of your symptoms and medicines.
What to bring
- A list of your medicines and supplements
- Notes on when symptoms started and what makes them better or worse
Questions to ask
- What's causing this?
- What treatment do you recommend?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Search ClinicalTrials.gov for studies on Twin or multiple pregnancy
Sources
Last updated 2026-11-12.