A little alcohol in pregnancy not tied to low birth weight and preterm delivery

Date: Nov-24-2014 A new study shows that drinking low to moderate amounts of alcohol while

pregnant appears not to be associated with higher risks of adverse birth outcomes

such as preterm delivery, low birth weight and other measures of fetal

growth.

Many women who consume low to moderate levels of alcohol continue to do so in the first month or so of pregnancy - often because they do not realize they are pregnant.

Senior author Michael B. Bracken, a professor of epidemiology at the Yale School

of Public Health in New Haven, CT, and colleagues report their findings in the

Annals of Epidemiology.

Health experts warn that drinking alcohol during pregnancy carries a potential risk of harming the baby. Heavy alcohol consumption during pregnancy is known to be linked to fetal alcohol
syndrome and other birth defects.

While some professionals may unofficially say it is fine for pregnant women to indulge in the occasional drink, in many countries - including the US - the official advice is women should avoid alcohol altogether when trying for a baby

and while pregnant, because there are no known quantities considered safe.

However, many women who consume low to moderate levels of alcohol continue to do

so in the first month or so of pregnancy - often because they do not realize they are

pregnant - and the researchers wanted to find out more about the risks for this

group.

For their study, the team analyzed links between alcohol consumption and birth

outcomes data on nearly 4,500 women and their babies. Their analysis included

information on low birth weight, preterm delivery and growth restriction while in the

womb.

They also looked at other birth outcomes such as newborns' birth length and head

circumference and whether they were admitted to intensive care units, were jaundiced

or had any major birth defects.

Nearly a third of women said they drank during the first month of pregnancy

The analysis showed that around 30% of the women reported drinking alcohol during

the first month of their pregnancy. The most commonly reported alcoholic drink was

wine.

Overall, the levels of alcohol consumed among women who said they drank during

their pregnancy were low. For the first month of pregnancy, the median level of

alcohol consumption was about one drink per week.

The researchers found there was a reduced chance of babies being of low weight, of

low length and having a small head circumference when they born to women who drank

low to moderate levels of alcohol in early pregnancy. All these features are

hallmarks of fetal alcohol syndrome.

The study also found that drinking in the third trimester was linked to a lower

risk of low birth weight and preterm delivery.

More research needed to confirm whether low alcohol intake in pregnancy is

harmless

Prof. Bracken says their results are consistent with those of other studies that

show there is no evidence low to moderate levels of alcohol consumption in pregnancy

cause harm, and more research should be done to investigate this apparent

contradiction.

He notes that the findings also show that alcohol consumption is most prevalent

during the first month of pregnancy - a period of early fetal development - when many

women do not realize they are pregnant.

"Whether these associations of reduced risk are due to healthier lifestyles of

women consuming low to moderate alcohol and especially wine cannot be fully ruled

out," explains Prof. Bracken.

He adds that although the study stopped short of looking at links between heavy or

chronic alcohol consumption in pregnancy and alcohol-related birth outcomes like

fetal alcohol syndrome, it nevertheless makes an important contribution in that it

examines more typical levels of alcohol consumption during pregnancy.

The National Institutes of Health funded the study.

Medical News Today recently reported on a new study that, for the first

time, identifies preterm birth as a leading cause of

death in young children. Of the 6.4 million deaths among children under the age 5

in 2013, worldwide, nearly 1.1 million were due to complications tied to preterm

birth.

Written by Catharine Paddock PhD

Not to be reproduced without permission.

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Courtesy: Medical News Today Note: Any medical information available in this news section is not intended as a substitute for informed medical advice and you should not take any action before consulting with a health care professional.