A client who delivered vaginally 2 days ago states that she wants to resume using her diaphragm for birth control. What information should the nurse share with her?

The diaphragm must be refitted after childbirth

The most effective form of contraception is a diaphragm

The diaphragm should be inserted 2 to 4 hours before intercourse.

Vaseline lubricant can be used when inserting the diaphragm