monozigoticos

Monozygotic twins, often referred to as identical twins, are a type of twin where two individuals develop from a single fertilized egg that splits into two embryos. This process occurs early in the development of the embryo, typically within the first few days after fertilization. As a result, monozygotic twins share the same genetic makeup, including identical DNA sequences. This genetic similarity is one of the key characteristics that distinguish monozygotic twins from dizygotic twins, who develop from separate eggs fertilized by separate sperm and therefore have different genetic material.

Monozygotic twins can be either fraternal or same-sex, depending on the sex chromosomes inherited. They are more likely to share the same blood type and other physical traits, although these traits can vary due to environmental factors and the influence of genes on the development of the body. Monozygotic twins can also have different physical appearances, such as different hair color or eye color, due to the random activation of genes during early development.

The likelihood of having monozygotic twins is estimated to be about 1 in 250 births. The risk increases with maternal age, as older mothers have a higher chance of having twins. Monozygotic twins can be born via vaginal delivery or cesarean section, and they can be born at the same time or with a slight delay between them. The development of monozygotic twins can sometimes lead to complications, such as twin-to-twin transfusion syndrome, where one twin receives too much blood from the other, potentially leading to health issues for both twins. Despite these potential challenges, monozygotic twins often have a strong bond and share a unique connection due to their shared genetic heritage.