3Meis PJ,Klebanoff M, Thom E,et al. Prevention ofrecurrent preterm delivery by 17-alpha hydroxyprogesteronecaproate. N Engl J Med, 2003,348:2379-2385.
4Farine D,Mundle WR, Dodd J? et al. The use ofprogesterone for prevention of preterm birth. J ObstetGynaecol Can, 2008 ,30 : 67-77.
5Society for Maternal Fetal Medicine Publications Committee.ACOG Committee Opinion number 419 October 2008(replaces no. 291,November 2003). Use of progesterone toreduce preterm birth. Obstet Gynecol, 2008,112 :963-965.
6Society for Maternal-Fetal Medicine Publications Committee,with assistance of Vincenzo Berghella. Progesterone andpreterm birth prevention: translating clinical trials data intoclinical practice. Am J Obstet Gynecol,2012 ,206 : 376-386.
7Woolf SH, Battista RN,Anderson GM,et al. CanadianTask Force on Preventive Health Care. New grades forreceommendations from the Canadian Task force onPreventive Health Care. CMAJ,2003,169:207-208.
8Hassan SS,Romero R, Vidyadhari D,et al. Vaginalprogesterone reduces the rate of preterm birth in women witha sonographic short cervix: a multicenter* randomized,double-blind, placebo-controlled trial. Ultrasound ObstetGynecol,2011,38: 18-31.
9Fonseca EB,Celik E,Parra M,et al. Progesterone and therisk of preterm birth among women with a short cervix. NEngl J Med,2007,357:462-469.
10Dodd JM, Flenady V, Cincotta R, et al. Prenataladministration of progesterone for preventing preterm birth.Cochrane Database of Syst Rev, 2006, (1) :CD004947.