Women whose sisters experienced extreme morning sickness, are 17 times more likely to develop the condition, suggests a new study. Hyperemesis gravidarum (HG) is an extreme form of nausea and vomiting that endangers their lives and often forces them to reluctantly terminate their pregnancies.
Researchers surveyed about 650 participants for the joint study on the genetics and epidemiology of HG. Women who had been diagnosed with HG and treated with IV fluids were asked to recruit, as a control, a friend who had at least two pregnancies lasting more than 27 weeks and who had not had HG. The researchers then compared the family histories of extreme nausea in the women with HG with those of the controls. The researchers found that women with HG were more than five times as likely as the controls to report having a sister with severe morning sickness or HG. When including sisters who had experienced HG - and excluding sisters with just severe morning sickness - study participants with HG had 17.3 times the odds of also having the condition. In addition, 33 percent of the women with HG reported having an affected mother, compared with only 8 per cent of the controls. The findings were published online in the American Journal of Obstetrics and Gynaecology. ANI
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