Before using spermicide, how long should it be inserted before intercourse?

The correct interval for inserting spermicide before intercourse is 15 minutes. This timing allows the spermicide to properly dissolve and become effective in creating a barrier against sperm. Spermicide typically contains ingredients that immobilize or kill sperm, but it requires a short period to activate fully and provide optimal protection.

Inserting it too soon or too late may reduce its effectiveness. For instance, if inserted very shortly before intercourse, there may not be enough time for it to reach its peak efficacy. Conversely, waiting too long after insertion could allow for sperm readiness, diminishing the intended contraceptive effect when sexual activity occurs. Therefore, the 15-minute pre-intercourse insertion time strikes a balance between effectiveness and practical use.