Hi!
Many studies show that a high percentage of women who discontinue their anti depressants during pregnancy end up becomming depressed and needing to resume them. Zoloft has beed fairly extensively studied during pregnancy and is perceived to be the safest of the SSRIs. If you were my patient, I would advise you to continue to use the lowest dose that works for you--while you are trying and while you are pregnant.
Also, women with underlying depression are at higher risk for postpartume depression, so you may actually need to increase the dose after the birth.
I have seen these drugs used for 10-15 years and have not seen any significant harm from them.
I hope this helps!
Good luck!
Dr B
Goodluck. I took zoloft during both my prgnancy and everything was fine. I know (as of June 23) have three beautiful daughters.