de Vries K, Lyons E A, Ballard G, Levi C S, Lindsay D J
Section of Diagnostic Ultrasound, Health Sciences Centre, Winnipeg, Manitoba, Canada.
Am J Obstet Gynecol. 1990 Mar;162(3):679-82. doi: 10.1016/0002-9378(90)90983-e.
Forty-six consecutive endovaginal ultrasound examinations were screened for the presence of myometrial contractions. The study group contained pregnant women up to 10 weeks' menstrual age, nonpregnant, and postmenopausal women. Rhythmic myometrial contractions of the inner myometrial third not previously reported were seen in 35 studies in pregnant, nonpregnant, and postmenopausal women. The contractions involved the inner third of the myometrium in all but two cases. In these two cases, all three muscular layers were involved. The majority of women showed retrograde contractions, with the contraction wave moving from the cervix to the fundus. In menstruating women and one case of abortion, the contractions were antegrade. It is our speculation that these retrograde contractions of the inner myometrial third may be important in sperm transport and for the conservation of early pregnancies within the uterine cavity.
对连续46次经阴道超声检查进行筛查，以确定子宫肌层收缩情况。研究组包括月经龄达10周的孕妇、非孕妇和绝经后妇女。在35项针对孕妇、非孕妇和绝经后妇女的研究中，发现了子宫肌层内三分之一处有节奏性的子宫肌层收缩，此前未见报道。除两例病例外，所有病例的收缩均累及子宫肌层内三分之一。在这两例病例中，所有三层肌肉均受累。大多数女性表现为逆行收缩，收缩波从宫颈向宫底移动。在月经女性和一例流产病例中，收缩为顺行。我们推测，子宫肌层内三分之一的这些逆行收缩可能在精子运输以及子宫腔内早期妊娠的维持方面具有重要作用。
