Pessary versus cerclage versus expectant management for cervical dilation with visible membranes in the second trimester.

Gimovsky AC, Suhag A, Roman A, Rochelson BL, Berghella V. Pessary versus cerclage versus expectant management for cervical dilation with visible membranes in the second trimester. J Matern Fetal Neonatal Med. 2016 May; 29(9):1363-6.

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