First, you really need to check with you GP whether it's safe for any potential baby to remain on sertraline. I know there are some ADs that are safe but I don't know which ones and that is something only a dr should advise you on. The massive hormonal changes during and after pregnancy are most definitely reasons to be cautious. I think that, as you've only now seeing an improvement in your mood, it may be sensible to wait until you've been stable for a while longer. I have to admit that I decided immediately after having my 2nd child that the risks to my mental health were too big for me to consider having another pregnancy. I was sterilised to ensure I couldn't. Ultimately it's a decision to be made between you and your husband and your GP will support you in making that decision. If you do decide to go ahead, make sure you have regular appts with your GP to monitor things.