Normally, each cell in the human body has 46 chromosomes, including the typical 22 pairs of chromosomes and two sex chromosomes. Females have two X chromosomes and males have one X chromosome and one Y chromosome. This is what makes the big difference between men and women.

The sex of the fetus is determined as soon as the egg is fertilized, and the genitals are the external manifestation of gender. So how are the baby's genitals formed in the womb, why is there a state of unclear gender (genital abnormalities), let's find the answer.

Currently, infertility due to male causes accounts for 40% of infertility causes. Among them, azoospermia or azoospermia is one of the most common causes.

The formation of the fetus's sex will occur at the time the egg and sperm meet, according to the principle: an egg carrying the X chromosome meets a sperm carrying the X chromosome to form an XX zygote - female, and an egg carrying the X chromosome meets a sperm carrying the Y chromosome to form an XY zygote - male.

47,XYY syndrome, also known as Jacob syndrome, is a syndrome in which males have an extra Y chromosome compared to the normal (46,XY). Most males with this syndrome are taller than average and do not have other phenotypic abnormalities. These individuals develop normally, have normal testosterone levels, and are able to have children.

Muscular dystrophy syndromes comprise a group of disorders that cause progressive muscle weakness and eventually muscle atrophy. People with muscular dystrophy have abnormal genes that prevent the production of proteins needed for healthy muscles. There are several types of muscular dystrophy syndromes, with the most common type of progressive muscular dystrophy showing symptoms in childhood and more common in boys. The other types of muscular dystrophy do not appear until adulthood.