Vaccines: The types of vaccines are toxoid (tetanus), inactivated bacteria and inactivated viruses (influenza, pneumococcal, hepatitis B, meningococcal, rabies), and live attenuated viruses (measles, mumps, poliomyelitis, rubella, smallpox, yellow fever). Immunization with toxoid, inactivated bacteria or viruses during pregnancy does not cause adverse fetal outcome. The use of live virus vaccines during pregnancy is not recommended and it is more desirable to administer this vaccine 3 months prior to the preparation for conception. However, if a woman is inadvertently vaccinated against measles, mumps, rubella, or smallpox during pregnancy, she does not necessarily need to terminate the pregnancy. Most reports indicate that those vaccine immunization agents pose only a theoretical risk to the fetus. Radiation: Many women seek early post-conception counseling for unintentional exposure to X-rays. There is no evidence that diagnostic radiation exposure increases the risk of adverse outcomes in the fetus, child, and throughout adulthood. Electromagnetic energy: There is no evidence that exposure of humans or animals to different electromagnetic fields such as high voltage lines, electric blankets, microwave ovens and cell phones can cause adverse fetal effects.