Patient's question:
What are the causes of congenital testicular dysgenesis, and can it be cured?Doctor's answer:
The composition of congenital testicular dysgenesis may be due to the failure of sex chromosomes to pair during the maturation and differentiation of oocytes, resulting in the formation of an egg containing two X chromosomes. If this egg is fertilized by a Y sperm, it forms a 47,XXY zygote. If germ cells fail to pair XY during the first round of maturation and differentiation, XY sperm can be formed. This sperm, when fertilizing an X egg, can also form a 47,XXY zygote. It is generally believed that the majority of 47,XXY compositions are due to the failure of sex chromosomes to pair during the maturation and differentiation of oocytes.