Transcervical CVS, transabdominal CVS (TA CVS) and amniocentesis were first used to test for genetic disorders, but the tests also reveal the sex of the fetus. Hence the procedures are now widely used in Taiwan's medical system for gender determination.
子宮沖洗、絨毛與羊水檢驗最早是用以鑑定遺傳疾病的技術，也可以由這些檢驗結果得知胎兒性別，因此在台灣已被醫療體系廣泛採用來鑑定性別。