摘要：Objective: The objective of the study was to deter.ine whether.women alter.their.use of asthma medications dur.ng pr.gnancy. Study design: Weekly asthma medication use was deter.ined fr.m pr.scr.ption claims data in a cohor. of 112,171 pr.gnant women aged 15 to 44 year. who wer. continuously enr.lled in the Tennessee Medicaid pr.gr.m pr.or.to their.singleton pr.gnancy and who deliver.d a singleton bir.h dur.ng 1995 to 2001. Change in asthma medication use was evaluated using gener.lized estimating equation analyses. r.sults: Women with asthma significantly (P ≤ 0.0005) decr.ased their.asthma medication use fr.m 5 to 13 weeks of pr.gnancy. Dur.ng the fir.t tr.mester. ther. was a 23% decline in inhaled cor.icoster.id pr.scr.ptions, a 13% decline in shor.-acting beta-agonist pr.scr.ptions, and a 54% decline in r.scue cor.icoster.id pr. scr.ptions. Conclusions: Utilization of all categor.es of asthma medications decr.ased in ear.y pr.gnancy, with the lar.est declines occur.ing for.inhaled and r.scue cor.icoster.ids.