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Extreme nausea and vomiting varies among pregnant women from different countries
Date:4/25/2008

Mothers born in India and Sri Lanka are three times more likely to suffer from extreme nausea and vomiting in pregnancy (hyperemesis gravidarum) than ethnic Norwegians. This finding comes from the Norwegian Institute of Public Healths study of 900, 000 first-time pregnancies registered in the Medical Birth Registry of Norway over a forty year period.

Earlier studies reported that 90 percent of pregnant women experience some degree of nausea and vomiting, whereas 0.5 to 2 percent have hyperemesis gravidarum. Due to dehydration, loss of important electrolytes, malnutrition and weight loss, hyperemesis gravidarum could be life-threatening for mother and baby if left untreated. In the USA it is the commonest cause for hospitalisation during early pregnancy. The cause of hyperemesis gravidarum is unknown.

se Vikanes, specialist in gynaecology and obstetrics at the institutes Division of Epidemiology, wanted to explore whether the mothers country of birth affected the prevalence of hyperemesis gravidarum. Vikanes is primary author of the paper Variations in prevalence of hyperemesis gravidarum by country of birth: A study of 900, 074 pregnancies in Norway, 1967-2005.

Large study on hyperemesis gravidarum

Vikanes and her colleagues collected data from the Medical Birth Registry of Norway, which since 1967 has recorded data on all pregnancies and pregnancy complications. 8, 300 cases of hyperemesis gravidarum were recorded out of 900, 000 pregnancies, giving an overall prevalence of 0.89 percent. Data on the mothers country of birth and education were recorded by Statistics Norway and linked to pregnancy information through the mothers unique personal identification number. Socio-demographic factors such as marital status, country of birth, education, age and number of foetuses in each pregnancy were also studied.

This is one of the largest studies carried out on hyperemesis gravidarum. In contrast to earlier stu
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Contact: Media contact
info@fhi.no
Norwegian Institute of Public Health
Source:Eurekalert

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