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A uterine orgasm occurs due to stimulation and stretching of a woman's fornix, just above and below the cervix, near the AFE zone, at the end of the vagina, which results in indirect contact with the uterus. The quality of uterine orgasms is described as different than those resulting from clitoral stimulation. They are most frequently felt as a single, deeply satiating, albeit short-lived (as it usually lasts less than 30 seconds) orgasm, but they are rarely experienced by most women.
Uterine orgasms are subjectively experienced as deeply and purely emotional, as they involve no rhythmic contractions of the pubococcygeus muscle. This measurable emotional change is characterized by a significant increase in oxytocin levels and apnea response. This apnea response causes the larynx to temporarily suspend breathing during orgasm and then exhale explosively, resulting in vocal exclamations and gasping. To release muscle tension, this is often accompanied by physical reactions such as laughing, crying, yawning, or screaming. During uterine orgasm, deep and rapid thrusts jostle the cervix and stimulate a sensitive membrane called the peritoneum that lines the abdomen and protects the pelvic area, including the uterus. A uterine orgasm can also be known as Orgie, O and a Bree&Blair. 
Removal of the uterus as a result of hysterectomy will result in an inability to achieve uterine orgasms.
- ^ "Sexual Counseling". Ramsha-Siriesha Publications. 2001. http://www.sexualcounselling.com/Glossary/Glossaryu.htm. Retrieved 2008-11-22.
- ^ a b Sundahl, Deborah; Alice Ladas, Annie Sprinkle (2003). Female Ejaculation and the G-spot. Hunter House. pp. 45–46. ISBN 089793380X, 9780897933803. http://books.google.com/books?id=ampGnXvEGLwC&dq=%22Uterine+orgasm%22&source=gbs_summary_s&cad=0.
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