Each year, more than 140,000 sets of twins are born. Here are some fascinating facts about twins you need to know right now.
Fascinating facts about twins
You can tell them apart by looking at their belly buttons!
Yes, you read that right. Navels are scars that form when the umbilical cord detaches after birth, and they’re just like fingerprints. Identical twins share DNA, but because they’re exposed to different areas of the womb during development, their fingertips’ ridges and whorls develop differently.
It’s possible for them to have two different fathers
When a woman has sex with more than one man during ovulation, Heteropaternal superfecundation happens. This is when sperm from each man fertilizes an egg, which then results in twins. Luckily, for the sake of sanity, this phenomenon isn’t something you regularly see in humans, although it does happen with dogs and cats.
Women today have a higher chance of conceiving twins than they would have 30 years ago
Since 1980, the birthrate for twins increased by 76%. This uptick has been attributed to the fact that more older women have kids these days, and women in their 30s are more likely to have twins than women in their 20s.
Just because they shared a womb and now share a birthday doesn’t make them twins
Sometimes, in very rare circumstances, a condition called superfetation happens, which is when a woman continues to menstruate and a second embryo forms. In general, the fetus that was conceived last will be born prematurely and the first conceived fetus is carried to term. But in some cases, the babies are born on the same day.
Twins have a secret language
Cryptophasia is a language that twins develop between them, and it’s something that only the two of them can understand. According to the Institute of General Linguistics, twin babies often use each other to learn vocabulary. It is estimated that up to 40% of twins create their own private language.
They might actually help their mom live longer
Researchers at the University of Utah studied birth and death records between 1800 and 1970 and found that the moms of twins tend to live longer than those with single children. Perhaps it’s because twin moms go through a lot more during the baby days and then take their time to enjoy their golden years. We’re not sure, but it’s still a cool fact though.