The good news is that if your cervix and uterus are ready and labor is imminent, sex at 40 weeks could get things moving. The bad? If the conditions (and your cervix) arent quite ripe yet, getting busy wont change anything. although having sex at 40 weeks didnt result in jump-starting my labor, i dont regret giving it a try. The unexpected benefit of bonding with my husband in that time outweighs the fact that. One small study found that sex did, in fact, induce labor in low-risk women at 41 weeks but when the study was repeated a few years later, full-term women who got it on were actually less likely to go into labor. In fact, most of the studies that have been done have either been inconclusive or shown that sex does not induce labor. theoretically, there are multiple reasons why having sex could induce labor. For example, sexual activity, especially having an orgasm, can release oxytocin, which may help jumpstart uterine. well, the thing about being 40 weeks pregnant, is that sex or no sex, you are likely to go into spontaneous labour at any moment. Labor induction also known as inducing labor is the stimulation of uterine contractions during pregnancy before labor begins on its own to achieve a vaginal birth. there are many theories about what might help an expecting mom go into labor including having sex, but obgyn dr. Nita landry breaks down what methods may or may not help a woman give birth. the clear liquid could be the bodys way of self lubricating, or you may have ruptured your membranes (broke you water). The reason sex is used to induce labor is that the added blood flow to the uterus and the contraction of the vaginal canal during orgasm can spur on contractions and your husbands semen softens the cervix making it possible for labor to progress. If you do try to induce before then, chances are it wont work anyway. First-time pregnancies are up to 80 more likely to go beyond the due date and you are not officially overdue until 42 weeks. Even then, a doctor cannot legally induce labor without your. I have been experiencing very very mild pain and pressure when walking and am extremely uncomfortable but have no other symptoms of being close to labor.