Which statement indicates a client needs further information about using a diaphragm for birth control?

The statement indicating that a client needs further information about using a diaphragm for birth control is correct because it reflects a misunderstanding of how a diaphragm functions. It's important for users to know that the diaphragm should not be left in place for extended periods after intercourse. Specifically, it must be removed within a certain time frame—typically within 6 to 8 hours—to minimize the risk of toxic shock syndrome and to ensure effective contraception.

The other statements provide accurate information. Reapplying spermicidal cream is indeed necessary with repeated intercourse to maintain effectiveness. The diaphragm can be inserted up to 6 hours before intercourse, allowing flexibility in preparation. Also, filling the diaphragm with spermicidal cream before insertion is an essential step to enhance its contraceptive efficacy. Each of these points reinforces proper use of the diaphragm as a contraceptive method, while the correct answer highlights a critical area where further clarification is needed.