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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]
While mixed twins are not as common in popular culture as identical ones, there are exceptions. In the 1970s reboot of Wonder Woman , the white-skinned Diana has a black-skinned twin sister named Nubia , who was kidnapped at birth by Ares and is historically DC Comics ' first black superheroine.
Conjoined twins, popularly referred to as Siamese twins, [1] [2] are twins joined in utero. [ a ] It is a very rare phenomenon, estimated to occur in anywhere between one in 50,000 births to one in 200,000 births, with a somewhat higher incidence in southwest Asia and Africa. [ 5 ]
After George Schappell came out, they became the first set of same-sex conjoined twins to identify as different genders, the site explained. The Schappell twins were craniopagus twins, meaning ...
A couple in Vietnam recently received some surprising news about their 2-year-old twins -- they have different fathers. ... toddlers are the same gender, ... mother but different fathers, is ...
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.
Biological sex is different and doesn't need to match one's gender. T.E.R.F.: T.E.R.F. is an acronym for trans-exclusionary radical feminist, which means someone who excludes trans women and non ...
Twins are by far the most common form of multiple births in humans. The U.S. Centers for Disease Control and Prevention report more than 132,000 sets of twins out of 3.9 million births of all kinds each year, about 3.4%, or 1 in 30. [5] Compared to other multiple births, twin births account for 97% of them in the US. [6]