Does a diaphragm provide any protection against STIs?

A diaphragm does not provide any protection against sexually transmitted infections (STIs). Its primary function is to act as a barrier method for contraception, preventing sperm from entering the uterus during intercourse. While it can help prevent pregnancy, it is not designed to block the transmission of infectious agents that cause STIs.

Having a diaphragm in place does not create a barrier that is effective against the pathogens responsible for STIs. Conditions such as chlamydia, gonorrhea, and HIV can still be transmitted between partners regardless of diaphragm use. This is why it is crucial to use additional protective measures, such as condoms, which can significantly reduce the risk of STI transmission.

In this context, other answer choices suggest varying degrees of protection or effectiveness that are not accurate, as diaphragms do not contribute to STI prevention on their own. Therefore, indicating that there is no protection aligns with the medical understanding of the diaphragm's role in sexual health.