North American Registry of Midwives (NARM) Practice Exam

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How long should a diaphragm be left in after intercourse to maximize effectiveness?

  1. 1 hour

  2. 3 hours

  3. 6 hours

  4. 12 hours

The correct answer is: 6 hours

A diaphragm should ideally be left in place for at least 6 hours after intercourse to maximize its effectiveness as a method of contraception. This duration is critical because it allows sufficient time for the sperm to be immobilized by the spermicide that is typically used with the diaphragm. If removed too soon, the sperm may still have the opportunity to travel past the diaphragm and lead to fertilization. The recommendation to leave the diaphragm in for 6 hours balances practicality with effectiveness. Leaving it in for shorter periods, such as 1 hour or 3 hours, may not provide adequate time for the contraceptive barrier to complete its work. On the other hand, keeping it in for more than 12 hours does not increase effectiveness and might increase the risk of urinary tract infections or irritation. Understanding this timing helps users plan their contraceptive methods more effectively, ensuring optimal protection against unintended pregnancy.