Can I have a preventative mastectomy while pregnant?

Thank you for your question and congratulations on your pregnancy.  If you are contemplating a mastectomy for prophylactic measures then I would recommend postponing your mastectomy surgery until after your delivery and possible breast feeding period.  It is best for your baby's health to postpone any elective surgery until after delivery not just  the mastectomy.  I would encourage you to discuss this further with your OB/GYN doctor.

Current wisdom would certainly side with waiting until you have delivered the baby.  Since the mastectomy is not contemplated in the management of aggressive breast cancer, the risk to your baby's well being would be too great.  Particularly in this early period of your baby's growth in utero, every precaution should be taken to ensure normal progress. Contact your obstetrical health care provider regarding stresses to be avoided during preganancy.