Is it safe to use both a condom and a diaphragm simultaneously? If so, would that be a more effective birth control method than using either individually?
Yes. Condoms can be safely used in combination with the diaphragm. And, yes, using both at the same time will further reduce the risk of unintended pregnancy.
Latex condoms can be used in combination with most methods of birth control. Not only do they increase a method’s effectiveness against unintended pregnancy, they also reduce the risk of sexually transmitted infection.
The female condom is the only method of birth control that should not be used with the condom. The kind of friction that develops between the latex condom and the polyurethane female condom can lead to breaks or tears. It is also possible that the female condom may stick to the latex condom, and both may be pulled out of place.