Monozygotic twins are at a higher risk for certain health complications compared to singletons or dizygotic (fraternal) twins. Some of the common issues include: - Twin-to-Twin Transfusion Syndrome (TTTS): A condition where blood flow is unevenly distributed between the twins. - Prematurity: Twins are often born preterm, leading to complications related to underdeveloped organs. - Congenital anomalies: Increased likelihood of birth defects compared to singletons.