Twins are two babies born from the same pregnancy, which means they share the same womb at the same time. This is possible when a mother’s egg splits into two after being fertilised or if the mother releases two eggs at the same time that are then fertilized by two different spermatozoids. In the first scenario, we get what we call identical twins, because they share the exact same DNA, just like a copy.
Identical twins often look completely alike, so much so that sometimes even their own parents can have trouble telling them apart. This can make for some fun or even mischief! Meanwhile, the other type of twins are called fraternal twins, and they are no more alike than regular siblings, sharing about 50% of their DNA.
Having twins can be an incredible but also challenging experience for parents. Twins often have a very close bond because they grow up together from the earliest moment possible – right in their mom’s belly!
Being a twin, or having twins in your family, can sometimes make you feel like you’re in a special club. After all, it takes two to make a twin! Twins continue to intrigue scientists, who study them to understand more about how genetics work. Because twins are so unique and special, they can tell us a lot about how all of us grow into who we are.