This is a very common question. In general, staying on an antidepressant often outweighs the risks to the pregnancy from the medication. However, there are some antidepressant medications that are preferred in pregnancy over others. Often, patients can be transitioned to these drugs prior to pregnancy. There are some psychiatric drugs that are contraindicated in pregnancy. I always recommend a discussion of risks/benefits with your OB/GYN early in pregnancy or if possible prior to pregnancy.