Pregnancy calendar week 16. http://kidshealth.org/parent/pregnancy_center/pregnancy_calendar/week16.html. Accessed June 2, 2016.
Week 16 – your second trimester. https://www.nhs.uk/start4life/pregnancy/week-by-week/2nd-trimester/week-16/#anchor-tabs Accessed Feb 2, 2021
面對早產（馬偕醫院）https://www.mmh.org.tw/know_health_view.php?docid=182 Accessed February 2, 2021
認識早產與安胎（台灣早產兒基金會）https://www.pbf.org.tw/gtc_01 Accessed February 2, 2021
產前檢查的時程及服務項目有哪些？（衛福部國健署）https://www.hpa.gov.tw/Pages/Detail.aspx?nodeid=1143&pid=6596 Accessed November 1, 2021