During pregnancy
There is no known safe amount of alcohol
Alcohol crosses the placenta, and a developing body does not process it like an adult. No threshold has been established below which absence of risk can be guaranteed, nor a stage of pregnancy in which drinking is considered safe.
A BAC calculator, body weight, drink type or time interval therefore cannot be used to define a “safe serving” during pregnancy. The simplest guidance is not to drink alcohol while pregnant or planning a pregnancy.
This is not judgemental language. It reflects the fact that individual susceptibility cannot be predicted and a risk-free dose cannot be identified.
No safe amount
There is no confirmed dose that can be considered risk-free for every pregnancy.
No safe time
Different organs develop at different times, and alcohol's effects are not confined to one trimester.
Every type contains ethanol
Beer, wine and spirits differ in serving size and strength, but ethanol remains the active substance.
If alcohol was consumed before the pregnancy was known
Do not panic, but do not try to assess the risk with a calculator alone
Many people learn that they are pregnant only after some time. Previous alcohol use by itself is not a diagnosis, and an article cannot predict the outcome for an individual pregnancy.
The most useful steps are to stop drinking once you know about the pregnancy and calmly tell a doctor or midwife what you remember: when alcohol was consumed, approximately how much and how often. A professional will consider this alongside the wider picture of health and prenatal care.
During breastfeeding
Alcohol in breast milk changes with the alcohol level in the blood
Alcohol levels in milk generally follow blood levels: they rise after drinking and fall over time as the body metabolises alcohol. Pumping and discarding milk does not speed the removal of alcohol from the body or from milk produced later.
Not drinking is the safest option. If alcohol is consumed, local guidance may describe an amount and interval before the next feed. Use current advice for the selected country because the details are not identical everywhere.
The baby's age, feeding method, health and the possibility of preparing milk in advance can also matter. An individual situation is best discussed with a doctor, midwife or lactation professional.
Time
Alcohol disappears as the body metabolises it; no procedure suddenly speeds this process up.
Amount
A larger amount usually means alcohol remains present for longer. “One drink” should reflect the real serving.
The baby's circumstances
Age, health and feeding method may affect individual advice.
A practical approach
Planning helps more than last-minute calculations
Check local guidance
Select the country and use advice from its health institutions, not a random rule written for another system.
Plan the feeding
If the situation is foreseeable, discuss feeding arrangements and timing with an appropriate professional beforehand.
Record the time and serving
The actual time, volume and strength are more useful than a general “I had a glass”.
Ask for help if not drinking is difficult
Difficulty avoiding alcohol is a reason to seek support, not a cause for shame or concealment.
History only as supporting information
Cheers can organise facts, but it cannot determine safety
App history can help recall the time, type and approximate amount of a drink, especially when a conversation with a clinician concerns a past event. It is a practical record, not a medical assessment.
The BAC estimate in Cheers was not designed to determine a safe amount during pregnancy or a certain time to breastfeed. Current local guidance and an individual conversation with a professional take priority in these decisions.
