Final answer:
Twin-twin transfusion syndrome results in one twin being larger and receiving too much blood, while the other twin is smaller and receives too little, leading to potential health risks and requiring medical intervention.
Step-by-step explanation:
The outcomes of twin-twin transfusion syndrome (TTTS) include one twin (the donor twin) who is smaller and may experience restricted growth, while the other twin (the recipient twin) is larger and receives too much blood. This imbalance can cause the donor twin to suffer from anemia and a lack of nutrients, while the recipient twin might develop heart failure due to the increased blood volume. As a result, one twin is larger than the other, and one twin receives too much blood, while the other receives too little.
Significant medical intervention is often required to manage TTTS, which can include procedures to balance the blood flow between the twins or early delivery in severe cases. The condition poses serious health risks to both twins, and the degree of impact varies from case to case.