Hi there
I have had two babies in the past two year. With the first one I managed to come off Effexor at 3 months. With the second I couldn't do it and had very long and extensive discussions with all sorts of people in clinical psychiatry about what to do. The bottom line is that because of the lack of definitive evidence about the effects in pregnancy it becomes a matter of playing the risks.
I decided eventually and in total agreement with doctors that there was more risk to the baby if I was not stable than there was risk to the baby of me taking the effexor. So I carried on taking it.
The only thing I did find out was that there had been some studies done showing blood results of newborns of mothers taking Effexor and that the drug was found in their system. However all systems were normal after 5 days when the tests were repeated.
From experience the only difference I noticed between my first and second is that the second one took longer to smile. Whether that is an affect of the effexor or the fact that he is just like his father is hard to know.
So hope this helps. Just try not to worry too much. As I say above - that is in all probability a greater risk to the health and happiness of your baby that taking effexor is.
Good luck
regards
Sarah