Final answer:
The nurse should advise the client to leave a diaphragm in place for at least six hours after sexual intercourse to prevent pregnancy.
Step-by-step explanation:
The diaphragm is a barrier method of birth control that is inserted vaginally and must cover the cervix to be effective in preventing pregnancy. It should be used with spermicide for additional protection. After intercourse, the diaphragm should be left in place for at least six hours to ensure any potential sperm are blocked from entering the uterus and making contact with an egg.
While diaphragms are a viable option for many, it is crucial to note that they carry a typical use failure rate of about 12 percent and do not protect against the spread of STIs. Additionally, their use may lead to an increased risk of urinary tract infections. For those who recently gave birth, especially by cesarean section or with other risk factors for blood clots, waiting periods are recommended before starting certain birth control methods that contain both estrogen and progestin.