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Alcohol and Pregnancy - information for you
Published November 2006 by the RCOG.
We welcome feedback from members of the public or from health professionals on our patient information. Please email any comments to: Lucy Arnold.
This information is also available as a pdf:
Alcohol and Pregnancy - pdf file (301 kb)
You may be interested to read the RCOG statement Alcohol consumption and the outcomes of pregnancy.
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Contents
Key points
About this information
How does alcohol affect pregnancy?
How is alcohol measured?
How much is safe to drink during pregnancy?
What is binge drinking?
What happens if I drink too much before I?m pregnant?
What happens if I?m drinking too much during pregnancy?
What is fetal alcohol syndrome?
Support for you
Is there anything else I should know?
Sources and acknowledgements
Useful additional information
Key Points
Fetal alcohol syndrome is the name given to a combination of features diagnosed in the baby after birth. It is caused by a woman drinking heavily throughout pregnancy.
Alcohol can have other effects on the baby which are known as fetal alcohol spectrum disorder (FASD).
When a woman drinks during pregnancy, the alcohol passes from her blood stream through the placenta and into the baby?s blood stream.
The safest approach in pregnancy is to choose not to drink at all.
Small amounts of alcohol during pregnancy (not more than one to two units, not more than once or twice a week) have not been shown to be harmful.
Alcohol is measured in units. One unit of alcohol is the equivalent of a half a pint of lager or beer, a glass of wine or a single shot of a spirit (gin, vodka, rum). 1 Alcohol and pregnancy: information for you Published November 2006 by the RCOG Due to be reviewed in 2008
When an individual drinks five or more units of alcohol on one occasion, this is known as binge drinking.
Regular binge drinking, around conception and in early pregnancy, is particularly harmful to a woman and her baby.
Heavy drinking is often related to unprotected sexual intercourse, which may result in an unplanned pregnancy and sexually transmitted infection.
It is important that you share information with your healthcare professional(s) about your drinking. Depending on your situation, your healthcare professional will then be able to offer you appropriate information and support.
Information about treatment and support is available from your:
practice nurse or GP at your general practice
midwife or obstetrician at your hospital.
About this information
This information is for you if you are pregnant or you are planning on becoming pregnant.
This information outlines the effects of drinking alcohol during pregnancy and provides advice about what is probably a safe amount to drink before and during your pregnancy. It also tells you about:
a safe limit when you are not pregnant
a safe limit when you are pregnant (both before and after the pregnancy is confirmed)
available information and support if you are drinking above a safe limit
the effect of drinking above a safe limit on the baby?s development in the womb
the effect of drinking above a safe limit while breastfeeding.
This information will help you to make informed choices about your own drinking. It aims to help you and your healthcare team make the best decisions about your care.
This information does not tell you in detail about:
fetal alcohol ayndrome
fetal alcohol spectrum disorder.
Some of the recommendations here may not apply to you. This could be because of some other illness you have, your general health, your wishes, or some or all of these things. If you think the treatment or care you get does not match what we describe here, then you should discuss this with your doctor, midwife, or another member of your healthcare team.
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How does alcohol affect pregnancy?
When a woman drinks alcohol during pregnancy, the alcohol passes from her blood stream through the placenta and into the baby?s blood stream. When a woman is drinking regularly during this time, the alcohol can disrupt the baby?s normal development in the womb.
Drinking alcohol during pregnancy can affect:
the way the baby develops in the womb
the baby?s health at birth
the baby?s susceptibility to illness in infancy, childhood, adolescence and adult life
the child?s ability to learn (learning difficulties).
The effects of drinking alcohol are most harmful for the baby when a woman drinks just before and during pregnancy. When a woman cuts down or stops drinking at any point during pregnancy, it can make a difference to the baby. However, in some instances, once the damage has been done, this cannot be reversed.
If you are a heavy drinker and then stop drinking immediately, you could experience side effects such as withdrawal, delirium and other difficulties. So if you want to stop drinking, you should discuss this first with your healthcare professional, who will be able to help you to manage any side effects.
How is alcohol measured?
In the UK, alcohol is measured in units. One unit of alcohol is defined as 10 ml (millilitres) by volume (ABV) or 7.9 grams by weight of pure ethanol.
All alcohol sold in the UK above 1.2% ABV should indicate how strong it is in percentages (%). For example, a bottle of wine is about 12% strength. A bottle of whisky is about 40% strength. The higher the percentage, the more alcohol a drink has in it. A glass of whisky, therefore, is stronger than a glass of wine.
The table below is a rough guide to the units of alcohol in standard measures of different drinks. This is an approximation and may vary depending on the brand of your drink and the size of the measure.Drinks poured at home tend to be larger measures than those provided in pubs and restaurants.
For women who are not pregnant, the UK Government?s maximum recommended number of units is 14 units per week.
Light drinking is defined as under 2 units a day.
Heavy drinking is defined as over 6 units a day.
Beer, Cider & Alcopops
Strength
ABV Half
Pint
(units) Pint
(units) Bottle/
Can (units)
Bottle
1 Litre
(units)
330ml
500ml
Ordinary strength beer, lager or cider e.g. Draught beer, Heineken, Woodpecker
3-4% 1 2 1.5 1.9 -
'Export' strength beer, lager or cider e.g.
Stella, Budweiser, Kronenbourg, Strongbow 5% 1.25 2.5 2 2.5 -
Extra strong beer, lager or cider e.g.
Special Brew, Diamond White, Tennants Extra
8-9% 2.5 4.5 3 4.5 9
Alcopops, e.g.
Bacardi Breezer, Smirnoff Ice, Reef, Archers, Hooch 5% - - 1.7 - -
Wines & Spirits
Strength
ABV Small glass/
pub measure (units) Wine glass*
(units) Bottle
750 ml (units)
Table Wine 10-12% - 1.5 9
Fortified wine
(sherry, martini, port) 15-20% 0.8 2-3 14
Spirits
(whisky, vodka, gin) 40% 1 - 30
- some measures of wine are more than this.
Source: Reproduced from the Royal College of Psychiatrists leaflet: Alcohol and Depression, Help is as Hand.
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How much is safe to drink during pregnancy?
Information about this is often unclear and conflicting. This can be confusing. There are only a few studies in this area and not everyone agrees with what these studies show.
Based on the best evidence to date, the Royal College of Obstetricians and Gynaecologists recommends that the only way to be absolutely certain that your baby is not harmed by alcohol is not to drink at all during pregnancy or while you are trying for a baby.