It has long been though that having sex in the later stages of pregnancy can induce labor. It is believed by some that orgasm can stimulate contractions and that a the hormone prostaglandin which is present in semen can induce labor. Doctors actually use prostaglandin in artificially induced labor so it’s understandable why this belief has persisted but a new study in Malasia has found no evidence to support this theory.
Women who have sex towards the end of their pregnancy are no more likely to induce labor than women who didn’t have any sex. Turns out that sex during pregnancy is just a fun thing to do and not much more than that. Oh well, last time I checked, “because it’s fun” was a pretty good reason for having sex.