Drinking iced Americano after having sex does not affect pregnancy. However, women who love coffee and drink 3-4 cups of coffee a day for a long period of time will have an effect on pregnancy and will reduce the chances of getting pregnant. This is because excessive caffeine intake by women can lead to lower estrogen production in the body, and the decrease in estrogen can cause ovulation dysfunction or decline, which ultimately affects the chances of pregnancy. In addition, excessive caffeine may also lead to a decrease in egg quality, increasing the risk of fetal malformations. So if a woman wants to get pregnant and have a baby, it is best to reduce or quit drinking coffee 3 months before pregnancy, especially if you find out you are pregnant.