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. 2008 Nov;141(1):13-7.
doi: 10.1016/j.ejogrb.2008.07.003. Epub 2008 Aug 26.

High prevalence of severe nausea and vomiting of pregnancy and hyperemesis gravidarum among relatives of affected individuals

Marlena S Fejzo  1 , Sue Ann Ingles, Melissa Wilson, Wei Wang, Kimber MacGibbon, Roberto Romero, Thomas M Goodwin
Affiliations

High prevalence of severe nausea and vomiting of pregnancy and hyperemesis gravidarum among relatives of affected individuals

Marlena S Fejzo et al. Eur J Obstet Gynecol Reprod Biol. 2008 Nov.

Abstract

Objective: The goal of this study was to determine the prevalence of severe nausea and vomiting of pregnancy/hyperemesis gravidarum among relatives of affected individuals.

Study design: Family history data were obtained on 1224 self-reported cases of hyperemesis gravidarum. Cases completed an online survey administered by the Hyperemesis Education and Research Foundation between 2003 and 2006.

Results: Approximately 28% of cases reported their mother had severe nausea and vomiting or hyperemesis gravidarum while pregnant with them. Of the 721 sisters with a pregnancy history, 137 (19%) had hyperemesis gravidarum. Among the most severe cases, those requiring total parenteral nutrition or nasogastric feeding tube, the proportion of affected sisters was even higher, 49/198 (25%). Nine percent of cases reported having at least two affected relatives including sister(s), mother, grandmother, daughters, aunt(s), and cousin(s).

Conclusion: There is a high prevalence of severe nausea and vomiting of pregnancy/hyperemesis gravidarum among relatives of hyperemesis gravidarum cases in this study population. Because the incidence of hyperemesis gravidarum is most commonly reported to be 0.5%, this study provides strong but preliminary evidence for a genetic component to extreme nausea and vomiting of pregnancy.

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Figures

Figure 1
Figure 1
Family 24 shows 3 out of 6 sisters affected, and one niece. Families 85 and 209 suggest HG can be inherited through the maternal or the paternal line. Arrows point to the affected proband and filled circles are family members reportedly affected with HG.
See this image and copyright information in PMC

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