women deposited monthly urine Samples to assess pregnancy status, and their monthly cycle phases, were calculated using a calendar-based method and compared between drinkers and non-drinkers.
During the study, 133 women became pregnant, and the results showed an effect of alcohol – the more alcohol a woman drank, the less likely she was to conceive. “Among heavy drinkers, the chance of pregnancy was 27.2%, which increased to 41.3% among non-drinkers. Light and moderate drinkers had about a 32% chance of conception,” Taylor says.
When researchers looked at the effects of drinking alcohol during different phases of the menstrual cycle, they found that moderate and heavy drinking The chances of conception decreased by almost half (44% and 49%), respectively, compared to non-drinkers in the post-ovulation phase. There was also some suggestion that heavy drinking before ovulation reduced the chances of conception.
how about binge drinking? Specifically, each additional day of excessive intake over a short period of time was associated with a 19% reduction in conception at the time of ovulation and between ovulation and menstruation. But before ovulation, it had no effect in the cycle.
The researchers also found that the type of alcoholic beverage did not change the results.
“Furthermore, the study showed that menstrual cycle length was similar for women in each drinking category, suggesting that drinking does not affect hormones that control cycle length,” says Christine. Metz, PhD, a professor at the Feinstein Institute for Medical Research in Manhasset, NY.
“The increase in estrogen can result in irregular cycles, delayed ovulation or anovulation. So couples may be trying to get pregnant at the wrong time in terms of ovulation,” says Taylor. “The increase in estrogen also leads to implantation after fertilization. The window of opportunity in the lining of the uterus can affect the timing.”
Experts aren’t exactly sure how a badly timed spike in estradiol might affect the odds of conception. Although it is not clearly understood, it appears that periods of heavy drinking may suppress not only ovulation, but also the ability to maintain an early pregnancy, notes Ali.