The jingle is 100% accurate for testing boys and girls. Human reproduction is something that everyone is concerned about. Many people want to know whether they will have a boy or a girl in the future, but in ancient times, there was no very effective testing method. With the development of modern science and technology, there are many scientific methods to predict the gender of pregnant women\’s babies. Below we will introduce these methods in detail. Gender Genes Human gender is determined by the X and Y chromosomes. Among the X and Y chromosomes, the X chromosome is a common chromosome and is common in women; while the Y chromosome is a common chromosome in men.