TY - GEN AU - Combs,C Andrew TI - Vaginal progesterone or cerclage to prevent recurrent preterm birth? SN - 1097-6868 PY - 2013///0222 KW - Cerclage, Cervical KW - Female KW - Humans KW - Pregnancy KW - Premature Birth KW - prevention & control KW - Progesterone KW - administration & dosage KW - Secondary Prevention N1 - Publication Type: Editorial UR - https://doi.org/10.1016/j.ajog.2012.08.031 ER -