Twin-to-Twin Transfusion Syndrome Quiz

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Seiji Kanazawa, MD, PHD (Obstetrics and gynecology (OBGYN))

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Learn more about Twin-to-twin transfusion syndrome

Content updated on Nov 2, 2022

What is twin-to-twin transfusion syndrome?

Twin-to-twin transfusion syndrome (TTTS) is rare and results from disproportionate blood supply between two (or more) identical fetuses that share a single placenta. One twin, the donor twin gives away more blood than it receives and has a risk of malnourishment and organ failure. The recipient twin receives too much blood and risks overworking the heart and other cardiac complications.

Symptoms of twin-to-twin transfusion syndrome

  • Currently pregnant

  • Rapid increase in abdominal circumference (waist size)

  • Feel my child is moving less. (Decreased fetal movements)

Questions your doctor may ask to check for twin-to-twin transfusion syndrome

Your doctor may ask these questions to diagnose twin-to-twin transfusion syndrome

  • Are you currently pregnant?

  • Has your abdominal circumference (waist size) increased rapidly?

  • Do you feel your child is moving less? This is also known as "decreased fetal movements".

Treatment for twin-to-twin transfusion syndrome

Ultrasound examination every two weeks, beginning at 16 weeks of pregnancy is required. Treatment of TTTS includes montoring and laser fetal surgery.

View the symptoms of Twin-to-twin transfusion syndrome

Diseases related to Twin-to-twin transfusion syndrome


  • Yoda H. Fetal and Neonatal Circulatory Disorders in Twin to Twin Transfusion Syndrome (The Secondary Publication). J Nippon Med Sch. 2019;86(4):192-200. doi: 10.1272/jnms.JNMS.2019_86-301. PMID: 31484880.

Reviewed By:

Seiji Kanazawa

Seiji Kanazawa, MD, PHD (Obstetrics and gynecology (OBGYN))

From our team of 50+ doctors

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Shohei Harase

Shohei Harase, MD


Kameda Medical Center, Japan

Yu Shirai

Yu Shirai, MD


Yotsuya Yui Clinic, Japan

Yoshinori Abe

Yoshinori Abe, MD

Internal medicine

Co-founder of Ubie, Inc.

Rohini R

Rohini R, MD

Ear, nose, throat (ENT)

Bayshore Health Centre, India

Seiji Kanazawa

Seiji Kanazawa, MD, PHD

Obstetrics and gynecology (OBGYN)

National Center for Child Health and Development, Japan

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