日本医生夏麻永一已研制成一种使用超声波鉴别胎儿性别的方法。此方法对母亲或胎儿没有危害作用。他发现男女胎的臀部形状不同,用超声波扫描可测出胎儿的臀部形 Japanese doctor Xia Ma Yongyi has developed a method of using ultrasound to identify the sex of the fetus. This method is not harmful to the mother or the fetus. He found that the shapes of the buttocks of male and female fetuses were different and the shape of the buttocks of the fetus could be measured with an ultrasound scan