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In very rare cases fraternal (and semi- or half-identical) twins can have the same mother and different fathers (heteropaternal superfecundation). In contrast, a fetus that develops alone in the womb (the much more common case in humans) is called a singleton , and the general term for one offspring of a multiple birth is a multiple . [ 3 ]
Monoamniotic twins are identical or semi-identical twins that share the same amniotic sac within their mother's uterus. [1] Monoamniotic twins are always monochorionic and are usually termed Monoamniotic-Monochorionic ("MoMo" or "Mono Mono") twins. [1] [2] They share the placenta, but have two separate umbilical cords.
Monochorionic twins are monozygotic (identical) twins that share the same placenta. If the placenta is shared by more than two twins (see multiple birth ), these are monochorionic multiples . Monochorionic twins occur in 0.3% of all pregnancies. [ 1 ]
Even more rare, the couple learned: Their girls are two sets of identical twins. “I was laughing and crying at the same time,” Farrah, 29, tells PEOPLE. “My husband was about to pass out.”
An unbelievable story - an Akron, Ohio, hospital welcomed a second set of extremely rare bundles of joy this week. ABC reports: "Just days after these rare mono mono twin girls were born holding ...
Identical twins are caused by a fertilized egg splitting and developing into babies with the same DNA, while fraternal twins are caused when two eggs are released, but they typically develop in ...
If the parents are both right-handed, in dizygotic and monozygotic twins there is a 21% chance of one being left-handed. If one parent is left-handed, in DZ and MZ twins there is a 57% chance of one being left-handed. If both parents are left-handed, it is almost certain one twin will be left-handed. [citation needed]
The Hayes also have two sets of twins, Kevin and Kyle (eight years old at the time of the sextuplets' birth) and Kieran and Meghan (five years old). They are the only family in the United States to have two sets of twins and a set of sextuplets. [93] The family was the subject of a reality television show, Table for 12, on TLC in the U.S. [94]