Matthews, A; Haas, DM; O'Mathúna, DP; Dowswell, T. Interventions for nausea and vomiting in early pregnancy.. The Cochrane database of systematic reviews. 8 September 2015, (9): CD007575. PMID 26348534.
web.archive.org
Pregnancy. Office on Women's Health. September 27, 2010 [5 December 2015]. (原始内容存档于2015-12-10).
womenshealth.gov
Pregnancy. Office on Women's Health. September 27, 2010 [5 December 2015]. (原始内容存档于2015-12-10).