Hsu emphasizes that because most older mothers abide by their doctor's orders and undergo amniocentesis, the number of births with chromosomal disorders among them has fallen dramatically. In fact, it is now substantially lower among older than among younger women.
徐振傑也特別強調，由於目前多數高齡產婦都能配合醫囑，接受羊膜穿刺等嚴密產檢，娩出染色體異常新生兒的比例已大幅下降，以致近年產下堂寶寶的，反倒以年輕產婦居多。