The effects of a preterm labor episode prior to 34 weeks are evident in late preterm outcomes, despite the administration of betamethasone.
Bastek JA, Sammel MD, Rebele EC, Srinivas SK, Elovitz MA. The effects of a preterm labor episode prior to 34 weeks are evident in late preterm outcomes, despite the administration of betamethasone. Am J Obstet Gynecol. 2010 Aug; 203(2):140.e1-7.