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(escitalopram) is a pregnancy
category C. Category C drugs have not been shown to be harmful to fetuses (if they had been, they wouldn't be Category C drugs). However, there are some reasons to be more concerned about these drugs than Category B drugs. If the pregnant patient will benefit from a Category C drug, it is generally used, although most obstetricians would prefer a Category B drug if it will give equivalently good results.
In a study published in the Archives of General Psychiatry (July 2011) it was found that escitalopram may confer a risk of the fetus developing an ASD (autism spectrum
"Although these findings indicate that maternal treatment with SSRIs during pregnancy may confer some risk to the fetus with regard to neurodevelopment, this potential risk must be balanced with the risk to the mother or fetus of untreated mental health disorders,". In addition, they noted, "the fraction of cases of ASD that may be attributed to use of antidepressants by the mother during pregnancy is less than 3% in our population, and it is reasonable to conclude that prenatal SSRI exposure is very unlikely to be a major risk factor for ASD."
The researchers also stated that there was some limitations to the study and "We recommend that our findings be considered as preliminary and treated with caution, pending results from further studies designed to address the very complex question of whether prenatal exposure to SSRIs may be etiologically linked to later diagnoses of ASDs in offspring," the authors wrote.
At this time, it is unlikely that your child will develop autism. The benefits outweigh the risks of discontinuing your medication. Continue taking your medication.