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Recordings were performed during the first 3 days of the menstrual cycle. Both incoordinate and coordinated myometrial activity was recognized. When coordination was present, the contraction wave as a rule started in fundus and was propagated towards the isthmus and cervix. Pinching and\/or palpation of the cervix elicited retrograde contractions, i.e. the contraction wave started in the cervix and moved towards the fundus. It was frequently observed that during vigorous contractions of the fundus, the pressure increase in the isthmus was small; in some cases even a decrease in pressure occurred in this region. The pressure recording technique functioned perfectly during all recordings and seems to facilitate detailed studies of myometrial activity in the non\u2010pregnant uterus.<\/jats:p>","DOI":"10.3109\/00016347909154927","type":"journal-article","created":{"date-parts":[[2009,12,8]],"date-time":"2009-12-08T18:04:32Z","timestamp":1260295472000},"page":"115-120","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Multichannel intrauterine pressure recording by means of microtransducers"],"prefix":"10.1111","volume":"58","author":[{"given":"Ulf","family":"Ulmsten","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karl\u2010Erik","family":"Andersson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2011,1,11]]},"reference":[{"key":"e_1_2_1_2_1","unstructured":"Anz\u00e9nB..Hysterometry\u2014a method for in vivo determination of pharmacologic effect on the myometrium.Thesis Karolinska Institutet Stockholm1977."},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.3109\/00016347509156772"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.3109\/00016347609156807"},{"key":"e_1_2_1_5_1","first-page":"175","article-title":"A catheter\u2010manometer calibrator\u2014a new clinical instrument","volume":"10","author":"Asmussen M.","year":"1975","journal-title":"Biomed Eng"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9378(16)34150-3"},{"key":"e_1_2_1_7_1","first-page":"257","volume-title":"Vitamins and Hormones","author":"Bengtsson L. 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