Final answer:
Key discharge teaching for a client post-evacuation of GTD should focus on monitoring hCG levels, recognizing signs of complications, and understanding the normal changes during pregnancy and the recovery process.
Step-by-step explanation:
The most important information that the nurse should include in the teaching plan for a client who had an evacuation of gestational trophoblastic disease (GTD) is the monitoring of the client's human chorionic gonadotropin (hCG) levels post-procedure. It is critical to track the decline of hCG levels to ensure that all GTD tissues have been removed and are not regrowing. Information about signs of possible complications, such as infection or hemorrhage, should also be included. Teaching the client about the normal changes during pregnancy and the recovery process after the evacuation of GTD is important for awareness and health maintenance.