"Are they identical or fraternal?" is one of the most common questions parents of twins are asked. ("Did you use fertility drugs?," "Are they boys or girls?," and "How much did they weigh when they were born?" are others.)
If one twin is a boy and the other is a girl, the twins are always, always, always fraternal. They can't be identical. As my mother says when anyone asks her if her grandtwins are identical, "Take a peek in their diapers and see."
If there are two boy twins, or two girl twins, the situation is more complicated. Fraternal twins can look very similar, and identical twins can have some differences. When I was pregnant and didn't yet know I was having a boy and a girl, I looked into the subject and found that DNA testing is the only accurate way to determine if same-sex twins are identical or fraternal. There are lots of casual ways for guessing, but it's the DNA that tells you for sure.
Of course, if you have one red-haired blue-eyed boy twin and one brown-haired brown-eyed boy twin, you may want to save your money for their college education instead.
Life-improving products, part 4 - (Continued from part 1, part 2, and part 3.) Stearns Youth Life Vest (photo from Amazon.com). I’d been too scared to take the kids to any body of water oth...