Please tell your dentist if you are or may be pregnant. An examination can generally be performed at any stage. However, if morning sickness makes it difficult to keep your mouth open comfortably, it may be better to postpone elective treatment until the more stable stage of pregnancy, generally after about five months. Routine dental treatment may be possible during this period, although X-rays and local anesthesia require appropriate precautions. Hormonal changes during pregnancy can also make the gums more susceptible to inflammation, so regular examinations and professional cleanings are especially important.