Most women can continue to engage insexual activity during pregnancy, includingsexual intercourse.[1] Most research suggests that during pregnancy both sexual desire and frequency of sexual relations decrease.[2][3] In the context of this overall decrease in desire, some studies indicate a second-trimester increase, preceding a decrease during the third trimester.[4][5]
Sex during pregnancy is a low-risk behavior except when the healthcare provider advises that sexual intercourse be avoided for particular medical reasons.[1] For a healthy pregnant woman, there are a variety of safe ways to have sex during pregnancy.[1]
Most research suggests that, duringpregnancy, sexual desire and frequency of sexual relations decrease.[2][3] In the context of this overall decrease in desire, some studies indicate a second-trimester increase, preceding a decrease.[4] However, these decreases are not universal: a significant number of women report greater sexual satisfaction throughout their pregnancies.[6]
Sex during pregnancy is a low-risk behaviour except when the physician advises that sexual intercourse be avoided, because it may, in some pregnancies, lead to serious pregnancy complications or health issues such as a high risk for premature labour or a ruptured uterus.[citation needed] Such a decision may be based upon a history of difficulties in a previous childbirth. However, it has been observed that evidence in this area is lacking and physicians' advice is more likely to be based on supposition than scientific knowledge.[7]
During pregnancy, thefetus is protected from sexual thrusting and unwanted semen by theamniotic fluid in the womb and by thecervical mucus plug in the woman'scervix, which forms shortly after conception.[8][9]
Some studies in the 1980s and 1990s contend that it is useful for pregnant women to continue to be sexually active, specifically noting that overall sexual satisfaction was correlated with feeling happy about being pregnant, feeling more attractive in late pregnancy than before pregnancy, and experiencingorgasm.[4] Sexual activity has also been suggested as a way to prepare for induced labor; some believe the natural prostaglandin content of seminal fluid can favor the maturation process of the cervix, making it more flexible, allowing for easier and faster dilation and effacement of the cervix. However, the efficacy of using sexual intercourse as an induction agent "remains uncertain".[10]
There is tentative evidence forexposure to partner's semen as prevention for pre-eclampsia, largely due to the absorption of several immune modulating factors present in seminal fluid.[11][12]
Sexual intercourse after giving birth can begin when the couple is both ready. However, most American couples wait six weeks.[13] Ovulation and thus pregnancy can begin before a return to regular menses.
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