河北省人民医院
河北省人民医院-
河北省人民医院心脏中心简介
Center of Heart in Hebei General Hospital
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研究对象：选择2004年12月~2005年10月在河北省人民医院妇产科住院分娩的孕妇50例，孕周均达到36周，且新生儿均为活产儿。
The study subject : 50 pregnant women who had prenatal examined and delivered in Obstetrics of the Hebei Provincial People Hospital were selected from December 2004 to October 2005 . The weeks of gestation of them was over 36 and their babies are living .