The incidence of developmental abnormalities in our country is 6-7 percent. We can call it a disorder that occurs in more than one thousand cases in the New Year. In our country there are dozens of courses.The most common developmental abnormalities in Hungary Since 1962, it is mandatory to report developmental abnormalities. In 1970 dr. Thanks to Endre Czeizel, VRONY (National Registry of Congenital Anomalies) was created, which collected and analyzed the data and information it received. Accounting, now online, has been working since then, and with the help of multiple birth disorders in Hungary, there has been lightening up. Based on statistical-mathematical calculations, incidence of developmental abnormalities 6-7%. These disorders are the second most important cause of infant death. Based on VRONY data, the most common developmental abnormalities are the circulatory system, the musculoskeletal system, the urinary system, and the digestive system. In most cases, the developmental disorder affects only one organ, but about 10% of the disorders have multiple (multiplex) developmental anomalies.