"Why do two embryos split in the first place? The cause of the division is still unclear. It might be related to the embryo's own development or the uterine environment. These twins originate from the same genes, and the genetic information of the two embryos is completely identical."
"There's also fraternal twins, where the mother's body releases two eggs simultaneously, and each combines with a different sperm to form two fertilized eggs. These two embryos develop independently in the uterus, with only about 50% genetic similarity."
"Now everyone should have a bit of understanding."
Yang Ping paused. He didn't want to be the only one speaking endlessly, preferring an informative teaching style that encourages everyone to think and form their own ideas.
"I understand now. Actually, conjoined twins are identical twins; it's just that their fertilized egg didn't completely separate into two embryos, hence forming conjoined twins later."
