Schoen, Corina N <br/><br/>
Why the United States preterm birth rate is declining.  [electronic resource] 

 -  American journal of obstetrics and gynecology  Aug 2015 
 - 175-80 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1097-6868 
<br/><br/><label>Standard No.: </label>10.1016/j.ajog.2014.12.011  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>17 alpha-Hydroxyprogesterone Caproate<br/>Administration, Intravaginal<br/>Adolescent<br/>Adult<br/>Cerclage, Cervical--trends<br/>Cervical Length Measurement<br/>Evidence-Based Medicine--trends<br/>Female<br/>Humans<br/>Hydroxyprogesterones--therapeutic use<br/>Practice Guidelines as Topic<br/>Pregnancy<br/>Pregnancy in Adolescence--statistics & numerical data<br/>Pregnancy, Multiple--statistics & numerical data<br/>Premature Birth--epidemiology<br/>Progesterone--therapeutic use<br/>Progestins--therapeutic use<br/>Recurrence<br/>Smoke-Free Policy--trends<br/>United States--epidemiology<br/>Young Adult