A client who had her first baby three months ago and is breastfeeding her infant tells the nurse that she is currently using the same diaphragm that she used before becoming pregnant. Which information should the nurse provide this client?

After ceasing breastfeeding the diaphragm should be resized.

Use an alternate form of contraception until a new diaphragm is obtained.

If no more than 20 pounds was gained during pregnancy, the diaphragm is safe to use.

Avoid intercourse during ovulation until the size of the diaphragm has been evaluated