CHAN, HY, KB CHEONG, KY LEUNG, and Mary HY TANG. “Trend of Prenatal Invasive Testing and Down’s Syndrome Screening in a Tertiary Referral Centre in Hong Kong”. Hong Kong Journal of Gynaecology, Obstetrics and Midwifery 9, no. 1 (March 31, 2023). Accessed April 29, 2024. https://hkjgom.org/home/article/view/90.