Final answer:
The nurse should mention that the client should be refitted for a new diaphragm if their weight changes by 20 percent or more. They should also insert the diaphragm no more than 2 hours before sexual intercourse and leave it in place for at least 6 hours after intercourse. Diaphragms should be replaced every 1-2 years.
Step-by-step explanation:
The nurse should make the following statement to the client: You should be refitted for a new diaphragm if your weight changes by 20 percent or more. This is because weight change can affect the fit and effectiveness of the diaphragm. The other statements provided in the options are not correct.
The diaphragm should be inserted no more than 2 hours before sexual intercourse and should be left in place for at least 6 hours after intercourse to ensure proper contraceptive protection. Additionally, the diaphragm should be replaced every 1-2 years, not every 5 years.