7Kramer J, Bowen A, Stewart N, et al. Nausea and vomiting of pregnancy: prevalence, peverity and relation to psychosocial health [ J]. MCN Am J Matem Child Nurs, 2013, 38 ( 1 ) :21 - 7.
8Ismail S K, Kenny L. Review on hyperemesis gravidarum[ J]. Best Pract Res Clin Gastroenterol, 2007, 21 (5) :755 -69.
9Seng L S, Schrot J A, van De Ven C, et al. Service use data anal- ysis of pre-pregnancy psychiatric and somatic diagnoses in women with hyperemesis gravidarum [ J ]. J Psychosom Obstet Gynecol, 2007, 28(4) :209 - 17.
10Bozzo P, Einarson T R, Koren G, et al. Nausea and vomiting of pregnancy (NVP) and depression: cause or effect [J]. Clin In- vest Med, 2011, 34(4) : E245.
