There are many women who come in for a checkup and often ask the doctor if they are pregnant with a boy or a girl and how to tell the difference between a boy and a girl. It is not that a baby with pinched legs is a boy. During the ultrasound examination, you must look at the genitals of the child. If you check the genitals and find that there is a penis, it is definitely a boy. If you find that there is no scrotum or penis and you can scan the labia majora, you can tell that the baby is a girl. So we can’t identify whether the child is a boy or a girl simply by the baby pinning his legs or the baby lying on his back, but must be able to scan the genitals by ultrasound to determine. Also, you can’t perform a gender check for non-medical purposes. The above is for reference only, please follow the doctor’s instructions for specific medication and treatment.