孕早期约有70%~80%的孕妇会出现食欲不振、恶心呕吐等早孕反应症状,多数孕妇无需特殊治疗,在8周左右自行消失,少数孕妇反应严重,发展为妊娠剧吐(Hyperemesis Gravidarum,HG)即在孕22周前,排除其他明显病因后,出现持续严重恶心、呕吐、脱水,体重短时间内下降超过5%,并伴有大量酮尿症状即为HG[1]。据国外文献报道,HG发病率约为0.3%~3.6%[2],不同国家之间差异较大,瑞 In early pregnancy about 70% to 80% of pregnant women will appear loss of appetite, nausea and vomiting and other symptoms of early pregnancy, most pregnant women without special treatment disappear around 8 weeks, a small number of pregnant women with severe reaction developed into hyperemesis gravidarum (Hyperemesis Gravidarum, HG), that is, HG [1]. HG [1] has been reported after 22 weeks of gestation, with persistent severe nausea, vomiting, dehydration and weight loss over 5% shortly after excluding the other obvious causes. According to foreign literature, the incidence of HG is about 0.3% to 3.6% [2], the difference between different countries is larger, Swiss