Twin Growth Discordance Calculator

Here’s a comprehensive table explaining Twin Growth Discordance, a condition where there is a significant difference in the growth rates or weights of twins during pregnancy. Growth discordance is generally considered a potential concern when the weight difference between twins exceeds 20%.

Twin Growth Discordance Table

Growth Discordance Percentage	Definition	Potential Causes	Risks	Monitoring and Management
0-10%	Normal Variation	Genetic differences, placental positioning	Generally no concern	Standard prenatal care
10-15%	Mild Discordance	Mild placental variation or genetic differences	Typically low risk	Standard monitoring
15-20%	Moderate Discordance	Unequal placental sharing, mild Twin-to-Twin Transfusion Syndrome (TTTS)	Increased risk of complications	Closer monitoring with frequent ultrasounds
>20%	Significant Discordance	Twin-to-Twin Transfusion Syndrome (TTTS), selective intrauterine growth restriction (sIUGR)	High risk of complications like preterm birth, low birth weight	Intensive monitoring, possible interventions
>25%	Severe Discordance	Severe TTTS, sIUGR, placental insufficiency	Increased mortality and morbidity risks	Specialized interventions, possible delivery planning