Hi , How are you doing ? These medicines are to control the psychiatric problems. All three drugs do cause defects in the newly formed baby, these defects are usually multiple & not correctable. Carbamazepine can cause - Spina bifida, craniofacial defects, cardiovascular malformations, hypospadias, and anomalies involving various body systems. But instead of this combination, if used alone, this can be safer Lithium can cause - heart defect, sudden death of baby etc better avoided in pregnancy Arip MT is contraindicated in pregnancy, only animal studies are available. So if I may advise, kindly consult your Neurologist & change over to less toxic drugs , reduce the dosage gradually under supervision & if possible switch to single drug. Once all stabilized pregnancy will be okay. This can avoid all the unnecessary anxiety with the medicines with known teratogenicity. Hope I have clarified your query, do write back if any more queries All the best Dr.Balakrishnan