@ddljohn-- I'm not sure what type of side effects trazodone causes in the fetus but I do know that it should not be taken during pregnancy.
I suffer from insomnia and have been on trazodone for a few years. Recently, my husband and I are thinking about trying for a baby. I told my doctor this and he told me to let him know when we decide because he will take me off of the trazodone. He wants to make sure that the medication is out of my system before I conceive.
So clearly, it's not good to take trazodone during pregnancy. My doctor said that he will find an alternative and safe medication or supplement that I can use when I'm pregnant.