The consumption of caffeine does not seem to reduce the chances of success of fertility treatments in women, while attention must be paid to alcohol consumption, which decreases the chances of having a child even when the man is drinking in the couple.
This is suggested by an analysis by Tongji Medical College (China), published in Acta Obstetricia et Gynecologica Scandinavica, which took into consideration the results of 7 studies on caffeine consumption and 9 studies on alcohol consumption, for a total of 26,922 women. (and partners) who have used fertility treatments.
"Couples should be aware that some modifiable factors in their lifestyle, such as alcohol consumption, can affect treatment outcomes. But how much these factors affect the reproductive system still needs to be explored," said Yufeng Li, among them. study authors.
The analysis of the data in particular found that caffeine consumption by the treated women and their partners was not significantly associated with any change in pregnancy or childbirth rates.
In contrast, maternal and paternal alcohol consumption appeared to negatively affect the chances of becoming pregnant after treatment and having a child born.
In particular, compared to couples who have refrained from drinking, the consumption of only one alcohol unit per day, i.e. the equivalent of a glass of wine or a can of beer, for a total of 84 grams of alcohol per week, among women it was associated with a -7% chance of pregnancy.
Negative effects were also found in the case of man drinking: those who consumed more than 84 grams per week were 9% less likely to become a father.