A client at 30 weeks gestation is reporting preterm contractions and is noted to be 2 cm dilated. What teaching will the nurse provide to the client regarding sexual intercourse?

Choice A rationale Limiting sexual activity to once a week is insufficient and clinically unsafe for a patient already demonstrating cervical changes at 30 weeks gestation. Any frequency of intercourse introduces risks of prostaglandin release and mechanical stimulation of the cervix. Because the patient is already 2 cm dilated, the priority is to halt further cervical thinning and dilation to prevent preterm birth. Weekly activity does not mitigate the physiological triggers that can accelerate labor in a compromised pregnancy. Choice B rationale Shallow penetration does not eliminate the risk of preterm labor induction. Seminal fluid contains high concentrations of natural prostaglandins, which act as potent cervical ripening agents. Even with limited penetration, the presence of semen near the cervix can stimulate effacement and further dilation. Additionally, female orgasm can cause rhythmic uterine contractions through oxytocin release. In the context of existing cervical dilation at 30 weeks, any form of penetrative intercourse is considered hazardous to the pregnancy. Choice C rationale Complete prohibition of sexual intercourse is the standard medical recommendation for patients presenting with preterm labor symptoms and cervical dilation. Semen contains prostaglandins that soften the cervix, while physical stimulation of the nipples or cervix during sex triggers the release of endogenous oxytocin from the posterior pituitary gland. These physiological factors can turn sporadic contractions into active labor. At 30 weeks, the goal is to maintain the pregnancy until fetal lung maturity is better established. Choice D rationale While the side-lying position might reduce inferior vena cava compression, it does not prevent the biochemical and hormonal triggers associated with intercourse. The physical mechanics of sex, regardless of position, still risk introducing bacteria into the vaginal canal and stimulating the lower uterine segment. Since this client is already 2 cm dilated, the protective mucous plug may be compromised. Positioning does not address the fundamental issue of prostaglandin exposure or oxytocin release during sexual activity.