Carrying to term, as used by our organization, refers to the decision to continue a pregnancy after receiving a prenatal diagnosis of a life-limiting condition. This phrasing is used to distinguish this choice from the decision to terminate a pregnancy following such a diagnosis. Carrying to term means carrying to the natural term of the life of the baby diagnosed with a life-limiting condition. The exact gestational age or term for each pregnancy continued will vary widely. 
Carrying to term
You can find the references annotated in each definition above at this link.