100. Moreover,a study carried out eight years ago by researchers at the University of Aarhus,in Denmark, revealed that women who suffered the death of a child or spouse from some catastrophic illness around the time they conceived were much more likely to give birth to girls than to boys.
主语a study后面是一个过去分词短语做定语。revealed后面的宾语从句比较复杂，从句的主体句式为women or spouse were likely to …，who suffered the death of a child是定语从句修饰women，状语from some catastrophic illness around the time they conceived修饰spouse，其中they conceived是省略that的定语从句修饰time。
spouse [spaʊs] n. 配偶
catastrophic [ˌkætə'strɒfɪk] adj. 灾难性的
conceive [kənˈsi:v] v. 怀孕
give birth to 生育