All of that positive sexual energy that produced a pregnancy comes full circle at childbirth, helping to stimulate labor and more, said Dr. Christiane Northrup, author of Women's Bodies, Women's Wisdom.
"The energy that gets the baby in gets the baby out," she said. "For 5,000 years, we've had a culture that separates sex from pregnancy, and that's our whole problem."
Indeed, the second trimester of pregnancy pushes more blood to the pelvic region, sometimes helping women become orgasmic for the first time, Northrup said.
7 Surprising Facts About Pregnancy
The documentary Orgasmic Birth made headlines for revealing that some women have orgasms during labor. Many doctors, midwives and doulas also recommend sex and/or nipple stimulation as a method for triggering labor.
And when women give birth in a sensual atmosphere, Northrup said, they're less likely to experience postpartum depression. "Talk about imprinting something positive on your body for the rest of its life," she said.