IUGR has various causes. The most common cause is a problem in the placenta (the tissue that carries oxygen, food and blood to the baby).Birth defects and genetic disorders can also cause IUGR.UGR has various causes. The most common cause is a problem in the placenta (the tissue that carries oxygen, food and blood to the baby).
Making the world better, one answer at a time. Ethel Rosenberg was the person who played the minor role in the passing of the atomic secrets to the Soviet. He was later convicted for passing the atomic secrets to the Soviets.
Greatly aided by its successful Soviet Alsos and the atomic spy ring, the Soviet Union conducted its first weapon test of an implosion-type nuclear device, RDS-1, codename First Lightning, on 29 August 1949, at Semipalatinsk, Kazakh SSR.hrough sources in the Manhattan Project, notably Klaus Fuchs, the Soviet intelligence obtained important information on the progress of the United States atomic bomb effort. Intelligence reports were shown to the head of the Soviet atomic project and had a significant impact on the direction of Soviet research.