3 doctors weighed in:
What are the effects of alcohol on a fetus during the very first weeks -- before a woman knew she was pregnant?
3 doctors weighed in

Dr. David Finke
Obstetrics & Gynecology
1 doctor agrees
In brief: Likely nothing
The main risk of alcohol exposure to a fetus is when it is repeated and continuous exposure over 9 months.
This is called fetal alcohol syndrome. If toxin exposure to an embryo is going to cause a problem very early, it is an "all or nothing" phenomenon. Meaning, if it was going to cause a problem, you would have a miscarriage. If it doesn't cause a miscarriage, the pregnancy will likely be ok.

In brief: Likely nothing
The main risk of alcohol exposure to a fetus is when it is repeated and continuous exposure over 9 months.
This is called fetal alcohol syndrome. If toxin exposure to an embryo is going to cause a problem very early, it is an "all or nothing" phenomenon. Meaning, if it was going to cause a problem, you would have a miscarriage. If it doesn't cause a miscarriage, the pregnancy will likely be ok.
Dr. David Finke
Dr. David Finke
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Dr. Alan Wartenberg
Addiction Medicine
In brief: Depends
A social drink or two on one or two days during that time is unlikely to have done anything.
Regular and consistent use during that first week may increase the chance of the embryo not implanting, but no organs are forming yet. It is drinking during organ formation (2-8 weeks) which causes birth defects, and drinking anytime in pregnancy can damage the baby's nervous system.

In brief: Depends
A social drink or two on one or two days during that time is unlikely to have done anything.
Regular and consistent use during that first week may increase the chance of the embryo not implanting, but no organs are forming yet. It is drinking during organ formation (2-8 weeks) which causes birth defects, and drinking anytime in pregnancy can damage the baby's nervous system.
Dr. Alan Wartenberg
Dr. Alan Wartenberg
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