The American College of Obstetricians and Gynecologists
The Society for Maternal-Fetal Medicine
The Society for Gynecologic Investigation
The American Institute of Ultrasound in Medicine (AIUM)
Sociedad Iberoamericana de Diagnóstico y Tratamiento Prenatal
Gießener Gynäkologische Fortbildung 2005-Universitatsklinikum Giessen
The International Federation of Gynecology and Obstetrics (FIGO)
The Journal of Maternal-Fetal and Neonatal Medicine
The Global Library of Women's Medicine
International Society of Perinatal
Obstetricians International Society of Perinatal
Obstetricians