When they’re born, each twin has different chemical markers on their DNA that change the activity of some genes. Why is this important?
The changes these markers cause are responsible for slight differences in appearance and big differences in personality. They also impact long-term adult health.
Twins are vulnerable to low birth weight which has been connected to adult obesity and heart disease.
As well, factors in the womb, such as nutrition levels and the size of the umbilical cord, influence babies’ brain development. One twin may experience academic problems because of less food and oxygen. Academic problems give rise to a host of social, economic, health and emotional problems that can shorten their life span.
They may look alike, but each twin has their own unique needs.
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