TY  - GEN
AU  - Schoen,Corina N
AU  - Tabbah,Sammy
AU  - Iams,Jay D
AU  - Caughey,Aaron B
AU  - Berghella,Vincenzo
TI  - Why the United States preterm birth rate is declining
SN  - 1097-6868
PY  - 2015///1013
KW  - 17 alpha-Hydroxyprogesterone Caproate
KW  - Administration, Intravaginal
KW  - Adolescent
KW  - Adult
KW  - Cerclage, Cervical
KW  - trends
KW  - Cervical Length Measurement
KW  - Evidence-Based Medicine
KW  - Female
KW  - Humans
KW  - Hydroxyprogesterones
KW  - therapeutic use
KW  - Practice Guidelines as Topic
KW  - Pregnancy
KW  - Pregnancy in Adolescence
KW  - statistics & numerical data
KW  - Pregnancy, Multiple
KW  - Premature Birth
KW  - epidemiology
KW  - Progesterone
KW  - Progestins
KW  - Recurrence
KW  - Smoke-Free Policy
KW  - United States
KW  - Young Adult
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1016/j.ajog.2014.12.011
ER  -