Hypoplastic Left Heart Syndrome (HLHS) is a congenital heart defect where the left side of the heart is underdeveloped. This condition affects normal blood flow through the heart, leading to inadequate oxygen supply to the body. Babies born with HLHS often require immediate medical attention and may need multiple surgeries or a heart transplant. The exact cause of HLHS is not well understood, but it is believed to involve genetic and environmental factors. Early diagnosis through prenatal imaging can help in planning treatment. Ongoing care from a team of specialists, including pediatric cardiologists, is essential for managing this complex condition.