Twin pregnancies are still extremely rare, even though their frequency increased by 72% between 1980 and 2018.Approximately 33 newborns per 1,000 are twins.
What is the probability of having identical twins? Approximately three to four identical twins are born for every 1,000 births. Consequently, once more, not very common.
Savannah Combs, 23, was overjoyed to learn that she was expecting twins. She later learned that they are both affected by the uncommon disease known as Down syndrome.