In a Danish study it was found that women who want to have children who undergo artificial insemination have little success in getting pregnant if they drink more than 4 cups of coffee a day. The success of a fertilization is only 50%.
Allegedly, coffee would have a harmful effect similar to alcohol, the researchers suspect. Even the chance of a live birth dropped by forty percent. All women who want to have children are therefore not advised to consume a lot of coffee.