How about twins at the first center

不客气

the formation of monozygotic twins is different from the above, which is formed by the division of the same fertilized egg. The fertilized egg splits into two (or more) to form two or more embryos
because they come from the same fertilized egg and accept exactly the same chromosome and genetic material, their gender, appearance and so on are exactly the same, and they are just like those in the same mold, sometimes even their own parents are difficult to distinguish. This similarity is not only similar in appearance, but also consistent in blood type, intelligence, even some physiological characteristics and susceptibility to diseases. We often say conjoined baby, in fact, is this kind of monozygotic twins, only because of the incomplete division of the fertilized egg at the beginning, resulting in some parts connected
in fact, it's not good to have twins either. It's the most important thing to have a safe mother and a healthy child. I wish you the best