CHAN H, CHEONG K, LEUNG K, TANG MH. Trend of Prenatal Invasive Testing and Down’s Syndrome Screening in a Tertiary Referral Centre in Hong Kong. Hong Kong J Gynaecol Obstet Midwifery [Internet]. 2023 Mar. 31 [cited 2024 Apr. 29];9(1). Available from: https://hkjgom.org/home/article/view/90