Twins do not have to be born on the same date. In fact, they can be born surprisingly far apart. The longest recorded gap between twin births is 85 days
Twins do not have to have the same father. While we often think of twins as having the same mother and father, it's possible for a woman to give birth to two children on the same day who don't share a father. This phenomenon is called heteropaternal superfecundation. It happens when a woman releases multiple eggs, each fertilized by sperm from separate instances of sexual intercourse
Identical twins have different fingerprints. Some people might think that identical twins are the same right down to those whorls and swirls on their fingerprints, but while identical twins share most of their genetic material, identical fingerprints aren't among them.
Certain diets may increase your chances of having twins.Researchers have found that women who eat dairy and animal products are much more likely to have twins than those that don't. This is likely due to a protein called IGF that increases the sensitivity of the ovaries to hormones that cause ovulation.