Most fertility specialists recommend avoiding alcohol entirely during IVF injections, and the research supports that advice. While an occasional drink may not definitively ruin a cycle, studies consistently link alcohol consumption during IVF to lower pregnancy rates, fewer eggs retrieved, and a higher risk of miscarriage. The safest level of drinking during an IVF cycle, based on the best available evidence, is zero.
How Alcohol Affects Your IVF Medications
The hormone injections used during IVF stimulation are processed by your liver and kidneys. Alcohol is also metabolized by the liver, which raises a practical concern: drinking during the stimulation phase could alter how your body clears these hormones, potentially changing how your follicles grow and how many mature eggs you produce. One study in Obstetrics & Gynecology found a significant difference in the number of eggs retrieved among women who drank even one to seven glasses of white wine per week during their cycle.
Beyond the medication interaction, alcohol metabolism generates reactive oxygen species, a type of molecular byproduct that causes oxidative stress. This oxidative stress has been linked to a range of reproductive problems, including endometriosis, polycystic ovary syndrome, unexplained infertility, and recurrent pregnancy loss. During an IVF cycle, when your ovaries are producing multiple follicles at once, that added oxidative burden is the last thing your body needs.
The Numbers on Pregnancy and Live Birth
A large dose-response meta-analysis published in Acta Obstetricia et Gynecologica Scandinavica pooled results from multiple studies and found that women who drank alcohol had a 17% lower chance of becoming pregnant after IVF compared to those who abstained. The threshold where the effect became statistically significant was about 84 grams of alcohol per week, roughly equivalent to six standard drinks. But the trend was negative at lower amounts too, meaning even moderate drinking moved the odds in the wrong direction.
The timing of drinking matters as well. Research has found that consuming just one drink per day was associated with fewer eggs retrieved, a higher risk of not becoming pregnant if drinking occurred in the month before the IVF attempt, and a higher risk of miscarriage if drinking happened in the week before egg retrieval. Moderate drinking of five or more drinks per week has been associated with nearly a fourfold increase in the risk of first-trimester miscarriage.
Your Partner’s Drinking Matters Too
This isn’t only about the person going through injections. The same meta-analysis found that male partners who drank saw a 12% reduction in live birth rates when consuming more than 84 grams of alcohol per week. A separate study using a mouse model explored this more closely and found striking, dose-dependent effects. Compared to controls, sperm from males with moderate alcohol exposure showed fertilization rates that dropped from 53% to 45%, and with heavier exposure, down to 38%.
The damage went beyond fertilization. Embryos created with alcohol-exposed sperm had dramatically lower survival rates. In the moderate-exposure group, embryo survival fell by 24%. In the heavier-exposure group, it dropped by 32%. Pregnancy success rates from the heavier-exposure group were cut in half compared to controls. The researchers traced these problems to disrupted gene expression in the embryos, specifically in genes that regulate early placental development. These weren’t effects of binge drinking; they reflected chronic, regular consumption before the IVF cycle began.
Is There a Safe Amount?
Researchers who reviewed the full body of evidence on alcohol and IVF concluded that “the safest level of drinking was reported to be zero.” That language is notably stronger than the hedged recommendations you might see for alcohol and general health. The reason is straightforward: IVF cycles are expensive, physically demanding, and emotionally intense. Even a small reduction in success odds from drinking represents a meaningful cost when weighed against what you’re investing in the process.
There’s no study showing that one glass of wine on a single evening during stimulation will tank your cycle. But the research consistently shows that the relationship between alcohol and IVF outcomes moves in one direction: more alcohol, worse results. No study has identified a “safe” threshold below which outcomes are completely unaffected. Given that the stimulation phase typically lasts 8 to 14 days, abstaining for that window is a relatively small ask compared to the stakes involved.
When to Stop Drinking Before Your Cycle
The research suggests that the risk window extends beyond just the days you’re taking injections. Drinking in the month before an IVF attempt has been linked to lower pregnancy rates, and drinking in the week before egg retrieval specifically correlates with higher miscarriage risk. For male partners, the effects on sperm quality reflect weeks to months of exposure, since sperm take roughly 74 days to fully develop.
A reasonable approach, based on the evidence, is for both partners to stop drinking at least a month before the IVF cycle begins and to stay alcohol-free through the embryo transfer and early pregnancy period. If you’ve had a few drinks earlier in the month before you expected your cycle to start, that’s not a reason to panic or cancel. But once you know your timeline, cutting alcohol gives your body the best conditions to respond to stimulation and support an embryo.