Twin-Twin Transfusion Syndrome
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Twin-Twin Transfusion Syndrome is not the name you expected.
Twin-twin transfusion syndrome (TTTS) is a rare disorder that sometimes occurs when women are pregnant with identical (monozygotic) twins. It is a rare disease of the placenta, the organ that joins the mother to her offspring and provides nourishment to the developing fetuses. During the development of identical twins, there are always blood vessels in the fetuses' shared placenta that connect their blood circulations (placental anastomoses). In most cases, the blood flows properly through these vessels. However, in twin-twin transfusion syndrome, the blood begins to flow unevenly, with one fetal twin receiving too much blood (recipient) and one receiving too little (donor). The recipient twin may experience heart failure due to continual strain on its heart and blood vessels (cardiovascular system). The donor twin, on the other hand, may experience life-threatening anemia, insufficient nutrition and oxygen due to its inadequate supply of blood. Such an imbalance in blood flow (i.e., twin-twin transfusion) can occur at any time during the pregnancy, including during delivery.
The effects of twin-twin transfusion syndrome can vary in severity from case to case, depending upon when during pregnancy the syndrome occurs, when it is diagnosed, and any treatment that may be given. The cause of this syndrome is not fully understood, although it is known that placental characteristics play an important role.
Fetal Hope Foundation
- 9786 South Holland Street
- Littleton, CO 80127
- Tel: (303)932-0553
- Tel: (877)789-4673
- Email: firstname.lastname@example.org
- Website: http://www.fetalhope.org
Genetic and Rare Diseases (GARD) Information Center
- PO Box 8126
- Gaithersburg, MD 20898-8126
- Tel: (301)251-4925
- Fax: (301)251-4911
- Tel: (888)205-2311
- Website: http://rarediseases.info.nih.gov/GARD/
Twin to Twin Transfusion Syndrome Foundation
- National Office
- 411 Longbeach Parkway
- Bay Village, OH 44140
- Tel: (440)899-8887
- Tel: (800)815-9211
- Email: email@example.com
- Website: http://www.tttsfoundation.org
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders (NORD). For a full-text version of this report, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".
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This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
Last Updated: 3/19/2012
Copyright 2012 National Organization for Rare Disorders, Inc.
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