Due to safety concerns, doctors are hesitant to perform CVS. But the situation is different with sperm separation, which is used to select gender before conception (by separating male "Y" sperm from female "X" sperm for artificial fertilization). The medical profession uses this technique with righteous enthusiasm, because it obviates the need to get rid of female fetuses.
對於絨毛檢查（抽取胎兒組織細胞），基於安全性顧慮，醫師還有所顧忌；但對懷孕前就先進行性別選擇的精子分離術（將孕育男性的 Y 精子分離出來進行受孕），因為不須事後將女性胎兒墮胎，則被醫學界採用的理直氣壯。