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.
Later that month, President Harry S. Truman announced to the American people that the Soviets too had the bomb. Three months later, Klaus Fuchs, a German-born physicist who had helped the United States build its first atomic bombs, was arrested for passing nuclear secrets to the Soviets.t a remote test site at Semipalatinsk in Kazakhstan, the USSR successfully detonates its first atomic bomb, code name âFirst Lightning.â In order to measure the effects of the blast, the Soviet scientists constructed buildings, bridges, and other civilian structures in the vicinity of the bomb.