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Obstet Gynecol. 1991 Nov;78(5 Pt 1):739-44.
Ultrasound surveillance of the cervix in twin gestations: management of cervical incompetency.
Michaels WH, Schreiber FR, Padgett RJ, Ager J, Pieper D
Research Library
The largest, free collection of academic references related to restorative reproductive medicine— made possible by donations.
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