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Am J Obstet Gynecol. 1992 Mar;166(3):896-900. doi: 10.1016/0002-9378(92)91358-h.
Diagnosis of cervical change in pregnancy by means of transvaginal ultrasonography.
Joffe GM, Del Valle GO, Izquierdo LA, Gilson GJ, Smith JF, Chatterjee MS, Curet LB
Research Library
The largest, free collection of academic references related to restorative reproductive medicine— made possible by donations.
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