THE HONG KONG COLLEGE OF OBSTETRICIANS & GYNAECOLOGISTS - HKCOG Guidelines (香港婦產科學院指引)
The International Society of Ultrasound in Obstetric & Gynecology - ISUOG Guideline (國際婦產超聲學會指引)
The Royal College of Obstetricians & Gynecologists. UK - RCOG Guideline (英國皇家婦產科學院指引)
Green Top
Consent
NHS
Antenatal Care - Routine Care for the Healthy Pregnancy Woman (Clinical Guideline 6 - October 2003)
Antenatal Screening Service for Down Syndrome in England: 2001
Antenatal Screening - Working Standards for Down's Syndrome Screening 2007
Antenatal Down Syndrome Screeing in New Zealand 2007
Journal
The Fetal Medicine Foundation. UK (英國胎兒醫學基金會)
World Health Organization (WHO) 世界衛生組織
NHS - UK National Screening Committee
International Federation of Gynecologyl and Obstetrics (FIGO)
Misoprostal Safe Dosage Guideline