American Board of Obstetrics and Gynecology
http://www.abog.org/

American College of Obstetricians and Gynecologists
http://www.acog.org/

OB/GYN.net
http://www.obgyn.net/

Medscape - Women's Health
http://www.medscape.com/womenshealthhome

eOB/GYN News
http://www.eobgynnews.com

Journal of Obestetrics & Gynecology
http://www.medical-library.org/j_obg.htm

Association of Professors of Obstetrics & Gynecology
http://www.apgo.org/home/