论文部分内容阅读
出生缺陷是指由于遗传因素、环境因素或两者共同作用于孕前或孕期,引起胚胎或胎儿在发育过程中发生的解剖学结构和/或功能上的异常。据报道,全世界每年生育缺陷儿约790万,确定
Birth defects refer to anatomical and / or functional abnormalities that occur in an embryo or fetus during development due to genetic factors, environmental factors, or both, before or during pregnancy. It is reported that there are about 7.9 million childbirth defects worldwide each year