If you're planning to become pregnant or suspect you're pregnant, you should see a dentist right away. Otherwise, you should schedule a checkup in your first trimester for a cleaning. Your dentist will assess your oral condition and map out a dental plan for the rest of your pregnancy. A visit to the dentist also is recommended in the second trimester for a cleaning, to monitor changes and to gauge the effectiveness of your oral hygiene. Depending on the patient, another appointment may be scheduled early in the third trimester, but these appointments should be kept as brief as possible.