prenatal diagnosis of genetic disorders; dr bernadette modell intvw sof:"the basic problem -- "doctors' looking at lab test - 產前護理 個影片檔及 b 捲影像00:37
prenatal diagnosis of genetic disorders; test tube for obtaining cell samples from tissue around the embryo

dr bernadette modell sof: "we do... - 產前護理 個影片檔及 b 捲影像00:46