Electrical impedance measurements: an objective measure of prelabor cervical change
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Uldbj erg N, Ekman, 1983, Ripening of thehuman uterine cervix related to changes in collagen, glyco-saminoglycans, and collagenolytic activity. Am J Obstet Gynecol, 147, 662
Avis NJ, 1996, In-vitro multi-frequency electrical impedance and modelling of the cervix in late pregnancy. Physiol Meas, 17, A97
Bishop EH, 1964, Obstet Gynecol, 24, 266