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Obstet Gynecol. 1996 Jul;88(1):20-3. doi: 10.1016/0029-7844(96)00092-0.
Transvaginal ultrasound and preterm prelabor: a nonrandomized intervention study.
Zalar RW Jr
Research Library
The largest, free collection of academic references related to restorative reproductive medicine— made possible by donations.
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