Contractility of the Fallopian Tube

Maia, Hugo; Mattos, Carlos E.R.

doi:10.1159/000301514

Cited by 19 publications

(4 citation statements)

References 14 publications

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“…It is possible for contractions to go up, down, or start in the midcorpus area and progress in each direction. In addition, tubal contractions have been found to be most active during the menses phase of the menstrual cycle [13], as well as during ovulation. Recently a study looking specifically at subendometrial contractility during menses in patients with and without endometriosis, showed that the patients with endometriosis had a retrograde pattern of contractility versus the antegrade pattern seen in the patients without endometriosis [14].…”

Section: Discussionmentioning

confidence: 99%

Sexual Activity, Orgasm and Tampon Use Are Associated with a Decreased Risk for Endometriosis

Meaddough

Olive

Gallup

et al. 2002

Gynecol Obstet Invest

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Objective: The purpose of the study was to determine if sexual behaviors, orgasm, tampon use, and douching during menstruation modify the risk of endometriosis. Methods: A case-control study was conducted. Subjects (n = 2,012) consisted of members of the Endometriosis Association and friends not affiliated with the organization who completed mailed surveys. Data were analyzed using χ², Fisher’s exact test, t test, and regression analyses. Results: There was no difference between study groups concerning douching practices. However, cases were less likely than controls to report sometimes or often engaging in sexual behaviors during menstruation (p = 0.002, OR = 1.5), and sexual behaviors during menstruation that included orgasm (p = 0.001, OR = 1.5). Cases were also less likely than controls to report using only tampons (p < 0.0001, OR = 2.6). Conclusion: Sexual activity, orgasm, and tampon use during menstruation may confer protection against endometriosis.

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Section: Discussionmentioning

confidence: 99%

Sexual Activity, Orgasm and Tampon Use Are Associated with a Decreased Risk for Endometriosis

Meaddough

Olive

Gallup

et al. 2002

Gynecol Obstet Invest

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“…In vivo studies of oviductal pressure changes have shown a similar pattern of small contractions interspersed with outbursts of increased activity in rabbits, monkeys, and humans (De Mattos and Coutinho, 1971;Coutinho et al, 1975;Fredericks et al, 1982). It is generally believed that short bursts originate in the circular muscle layer, and long trains of spikes in the longitudinal muscles which cover the oviduct dorsally and ventrally and are continuous with the muscles of the mesotubarium superius and mesosalpinx (Talo and Brundin, 1973;Gonzalez de Vargas et al, 1976) (Black et al, 1980).…”

Section: Discussionmentioning

confidence: 99%

Electromyographic activity and noradrenaline content of the rabbit oviduct under different hormonal states

Sachy¹,

Jakubowski²,

Bernet³

et al. 1989

Reprod. Nutr. Dévelop.

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Summary ― Spontaneous electromyographic (EMG) activity of the oviduct recorded in vivo inuntreated, estrogen-treated, and progesterone-treated castrated rabbits was found to exhibit two main patterns : short spike bursts lasting 1-10 s and long trains of action potentials lasting several minutes, which constituted the major component of EMG activity.After estrogen treatment, both wet weight and noradrenaline (NA) content of the castrated rabbit oviduct were enhanced mainly at the ampullary-isthmic junction; long trains of discharges were significantly shorter (2.0―2.7 min vs 3.6-4.6 min) and appeared at more frequent intervals (9.8―12.2 min vs 14.2―22.6 min). After progesterone treatment, spontaneous EMG activity was not significantly different from that in untreated castrated rabbits (as was the NA content) except at the ampullary―isthmic junction.NA injection elicited a stimulatory response of the oviduct lasting 1―7 min in the three hormonal states. Phentolamine strongly depressed spontaneous EMG activity but the inhibition was more transient in castrated rabbits than in estrogen-treated and progesterone-treated animals. Propranolol had no effect on spontaneous EMG activity. intervalles plus rapprochés (9,8―12,2 min vs 14,2-22,6 min). Après traitement par la progestérone, l'activité EMG spontanée n'apparaît pas différente de celle enregistrée chez l'animal castré non traité, de même que la teneur de l'oviducte en noradrénaline, sauf pour la jonction isthme―ampoule. Une injection de noradrénaline provoque l'apparition d'une salve de potentiel de 1 à 7 min de durée dans les trois conditions hormonales. La phentolamine déprime fortement l'activité EMG spontanée, mais l'inhibition est plus transitoire chez les lapines castrées non traitées que chez les animaux traités par les estrogènes et par la progestérone. Le propranolol est sans effet sur l'activité EMG spontanée. Ces résultats, ainsi que les teneurs élevées en noradrénaline mesurées dans toutes les parties de l'isthme, montrent qu'il est possible que 1 innervation adréner-gique de l'oviducte joue un rôle dans l'organisation de la motricité spontanée de l'oviducte chez la lapine.activité électromyographique ― stéroïdes sexuels -noradrénaline -oviducte -lapine

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“…Coutinho et al directly measured intratubal pressure in women to characterize tubal contractile patterns throughout the menstrual cycle. 17 Their data showed a peak in contractile activity at ovulation. They concluded that a decrease in smooth muscle contractility after ovulation may facilitate the timely passage of the ovum past a previously contracted AIJ.…”

Section: Tubal Contractilitymentioning

confidence: 98%