About 50 °/c, of pregnancies are not planned and this information is very important when prescribing drugs to women in the generative phase. Studies on the use of medications in pregnancy have shown that as many of 80-99 % of pregnant women rake four to seven drugs during pregnancy. According to other studies, between 40 and 90 % of pregnant women rake one or more drugs during pregnancy. Most drugs can pass through the placenta and have potential pharmacological and teratogenic effects on the embryo and fetus. Unfortunately, also some untreated diseases can affect both mother and fetus. Therefore, a rational approach to drug development for pregnant women should incorporate assessment of the risks of untreated maternal illnesses an...