Ativan (or Lorazepam) has been shown to cause harm to the fetus. If you think you may be pregnant, contact your doctor. You will need to discuss the benefits and risks of using Lorazepam while you are pregnant. In some cases, the doctor and you will determine that the benefits outweigh the risks and continue use of the drug. However, due to the adverse effects of Ativan (Lorazepam), this is usually left at the discrepancy of your doctor.