Is sex safe during pregnancy?

What does the evidence say about sex during pregnancy?

1. Spotting or light bleeding after sex is not uncommon and falls into the same low-concern category as light bleeding after a Pap test or pelvic exam. 1
2. Sexual activity is not on ACOG's list of risk factors for preterm labor, which includes things like a past preterm birth, a short cervix, carrying more than one baby, vaginal bleeding, and infection. 2
3. A study of 406 pregnant women found that how often, or when, they had sex during pregnancy made no real difference to any pregnancy or newborn outcome, supporting that intercourse is generally safe in a healthy pregnancy. 3
4. Clinicians commonly recommend holding off on intercourse in high-risk pregnancies involving placenta previa, a short cervix or history of preterm birth, ruptured membranes, or a cervical cerclage, though the review notes that the actual evidence behind those restrictions is thin and better studies are needed. 4
5. In a study of 168 pregnant women, desire and arousal decreased noticeably as pregnancy progressed, with the biggest changes showing up in the third trimester among first-time mothers. 5

Is sex safe in each trimester?

• First trimester. In the first trimester, sex is typically fine if your pregnancy is uncomplicated. Nausea, breast tenderness, fatigue, and worry about early loss often lower interest more than any physical limit does. Light spotting after sex is common and isn't automatically a warning sign, though it's still worth mentioning at your next prenatal visit.
• Second trimester. Many people find desire and comfort return somewhat in the second trimester as early nausea eases, even though a growing belly can make some positions less practical. This is still a low-risk window for an uncomplicated pregnancy. The exceptions that matter, like placenta previa or a short cervix, are specific findings your clinician will flag for you.
• Third trimester. Desire, arousal, and frequency are consistently lowest in the third trimester, which reflects physical discomfort and fatigue, not a rise in medical risk for most people. Call your clinician for ruptured membranes, regular contractions before 37 weeks, or new bleeding, whether or not sex was involved. Those are the same warning signs that matter throughout late pregnancy.