出生缺陷是指出生时发现的遗传性疾病和不具遗传倾向的各种先天畸形,而且主要是后者,这类先天畸形往往是孕前、孕早期受到不良环境因素作用的结果。10余年来出生缺陷儿死亡率相对上升,一些国家已居首位。所以开展对出生缺陷的监测,并对其产生的环境条件等各种因素进行统计分析,对于优生、减少出生缺陷,特别是不具遗传倾向的各种先天畸形有着重要的意义。 1986年10月1日至1987年9月30日在我院出生的孕28周以上或体重超过1000g的所有出生儿3565例(包括活产、死产、死胎及治疗性引产),监测期为1～7天。其中,男1832 Birth defects are the genetic diseases found at birth and are not genetic predisposition of a variety of congenital malformations, but mainly the latter, such congenital malformations are often the result of adverse environmental factors before and during the first trimester. In the past 10 years, the mortality rate of birth defects has risen relatively. Some countries have taken the first place. Therefore, carrying out the monitoring of birth defects and making statistical analysis on various factors such as the environmental conditions are of great significance for eugenics, birth defects reduction, and in particular, various congenital deformities without genetic predisposition. 3565 cases (including live births, stillbirths and stillbirths) of all births born in our hospital from October 1, 1986 to September 30, 1987, with gestational age of over 28 weeks or weighing over 1000g, with a monitoring period of 1 ~ 7 days. Among them, male 1832