![]() ![]() ![]() Newborn frequencies of untoward pregnancy outcomes, stillbirths, and malformations are shown in Tables 1, 2, and 3 according to parental dose or exposure. Physical examination of newborns during the first two weeks after birth provided information on birth weight, prematurity, sex ratio, neonatal deaths, and major birth defects. ![]() This supplementary ration registration process enabled the identification of more than 90% of all pregnancies and the subsequent examination of birth outcomes. When surveillance began, certain dietary staples were rationed in Japan, but ration regulations made special provision for women who were at least 20 weeks pregnant. ![]() During that period, 76,626 newborn infants were examined by ABCC physicians. Monitoring of nearly all pregnancies in Hiroshima and Nagasaki began in 1948 and continued for six years. No statistically significant increase in major birth defects or other untoward pregnancy outcomes was seen among children of survivors. ![]()
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