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How long after I've stopped taking citalopram is it safe to try for a baby? - citalopram more drug_warnings_recalls

I took Celexa for mild depression for 6 months. Now I am weaning them (after the doc) advice for my husband and I try to have a baby. I know that citalopram is not safe during pregnancy, but how long does it take to leave the system completely, that pregnancy safe? Any advice would be welcomed.