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Morning sickness linked to parents
Reported May 01, 2010
Women whose mothers experienced severe morning sickness are three times more
likely to develop the condition in their own pregnancy, research has
suggested.
Serious sickness affects up to 2% of pregnancies, meaning thousands of women
in the UK suffer each year.
The condition is called hyperemesis gravidarum and is defined as nausea and
vomiting before the 22nd week of pregnancy, which can lead to weight loss,
dehydration and deprivation of essential nutrients for both mother and baby.
Babies whose mothers have the condition can be born premature or at low
birth weight, and it can prove fatal in extreme cases.
In the latest study, experts from the Norwegian Institute of Public Health
who studied more than two million births between 1967 to 2006 found women
were three times as likely to suffer if their own mothers had the condition
during any pregnancy.
Writing online in the British Medical Journal (BMJ), they concluded: "The
risk of hyperemesis in a pregnant woman is threefold if the woman's mother
had ever experienced hyperemesis in a pregnancy.
"This was regardless of whether hyperemesis had occurred in the pregnancy
leading to the woman under study or in a previous or subsequent pregnancy."
Acting as a comparison group, the female partners of men whose mothers had
also suffered from the sickness had no increased risk in their pregnancies.
The experts wrote that the condition had previously been thought to be
caused by psychological factors "such as an unconscious rejection of the
child or partner", but although psychological factors can play a part - and
can worsen as a woman becomes distressed at the level of sickness - this is
not the whole story, they said.
Genetics may play a role in the condition alongside environmental factors
shared by mothers and daughters, such as same diet, infection or lifestyle.
Source : The Press Association |
