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Twin or multiple pregnancy

Also called: Twin pregnancy, multiple pregnancy

Carrying twins or more, with more checkups because of higher risks of preterm birth and preeclampsia.

More checksYes

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

When to get medical care

Call 911Heavy bleeding, severe belly pain, fluid leaking, fever, or fewer baby movements: call 911 or go to labor and delivery.
Get care todayNew or worse symptoms, or symptoms with fever.
See a doctor soonSymptoms that last or keep coming back.

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

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.