Unfortunately, none of these methods has been proven effective, and some may not be safe. Some people believe that the physical movements during sexual intercourse tend to trigger labour, while others believe it is the emotional release experienced during the act Having sex won’t induce labor
Common Ways to Induce Labour - Madam Partum
But it might help speed things along if you’re already close to going into labor
Uterine contractions and the hormones released during orgasm may help jumpstart labor if you’re close to giving birth
Nipple stimulation can also help Sexual intercourse at term has been associated with earlier onset of labour and reduced need for induction at 41 weeks' gestation (tan 2006) It is a non‐medical method allowing the woman greater control over the process of attempting to induce labour. One thing that’s rumored to help naturally induce labor is having sex — a lot of people say that sperm can soften the cervix and help get things going.
Sex can sometimes stimulate labor, but it’s not a guaranteed or primary method to induce childbirth. How does sex help induce labour