For the third trimester (25-40 weeks)
The foetal growth continues and the focus of the concern now, is the risk to the upcoming birth process and the safety and comfort of the pregnant woman (e.g the chair positioning and the avoidance of drugs that affect the bleeding time). It is safe to perform a routine dental treatment in the early part of the 3rd trimester, but from the middle of the 3rd trimester, routine dental treatments are avoided.