National Day

(Monthly) World Twin To Twin Transfusion Syndrome Awareness Month

Celebrated on 12/01/2026

Quick Fact

Twin-to-twin transfusion syndrome (TTTS) affects approximately 10-15% of identical twin pregnancies that share a placenta. Without treatment, the survival rate for both twins can be as low as 20%, but with early detection and interventions like laser surgery, survival rates can exceed 90%.

Origins and Establishment of (Monthly) World Twin To Twin Transfusion Syndrome Awareness Month

Twin-to-twin transfusion syndrome (TTTS) Awareness Month was established to increase understanding of this serious condition that affects identical twins sharing a placenta. The initiative was spearheaded by organizations such as the Twin to Twin Transfusion Syndrome Foundation, founded in 1998 by Mary Slaman-Forsythe after her own twins were diagnosed with TTTS. The month-long observance aims to educate parents, healthcare providers, and the public about the risks, symptoms, and treatment options for TTTS.

Evolution and Modern Commemoration

Since its inception, TTTS Awareness Month has grown from grassroots efforts to a globally recognized campaign. Initially focused on raising awareness through local events and support groups, it now leverages social media campaigns, webinars, and partnerships with maternal-fetal medicine specialists. Modern commemorations include wearing teal (the awareness color), sharing survivor stories, and fundraising for research and family support. The month also coincides with advocacy for improved prenatal screening and access to specialized care.

Facts & General Observations

  • TTTS occurs in about 1 in 1,000 to 1 in 2,000 pregnancies overall, and in 10-15% of monochorionic twin pregnancies.
  • The condition results from abnormal blood vessel connections in the shared placenta, leading to one twin (the donor) receiving too little blood and the other (the recipient) receiving too much.
  • Fetoscopic laser ablation, the most effective treatment, was pioneered in the 1990s and has since become the standard of care, improving survival rates and reducing neurological complications.

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