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The final 12 weeks of a full-term pregnancy are known as the third trimester of pregnancy. The third trimester can be full of excitement. It also may challenge your body and mind.

The size and position of the unborn baby, also called a fetus, in the uterus might make it hard for you to get comfortable. You may be tired of pregnancy and eager to move on to the next stage. And you might feel let down if you don't give birth by your due date.

Try to stay upbeat as you look forward to the end of your pregnancy and the birth of your baby. Here's what to expect as you wait.