Professor Chang Sheng-ping, director of the Department of Obstetrics and Gynecology at Taipei's Veterans 'General Hospital, notes that the sperm separation technique used in clinics to select the sex of fetuses was first invented and patented in the USA as a method of gender screening.
婦產科醫學會理事長張升平表示，被坊間用來進行選擇胎兒性別的「精子分離術」，最早是美國發明用來做性別篩選，發明人還申請過專利。