How do you look at boys and girls? ——Decrypting the fetal gender identification method. For couples who are about to become parents, many people really want to know whether they will give birth to a boy or a girl. This requires a method to identify the fetal gender. There are many instruments and methods on the market to identify the gender of the fetus, but some of them are not accurate. This article will introduce some more reliable methods. Part 1: Determining the gender of the fetus through B-ultrasound B-ultrasound is an imaging technology that uses ultrasound to diagnose the internal conditions of the human body. It is also a commonly used method at present.