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  2. Multiple birth - Wikipedia

    en.wikipedia.org/wiki/Multiple_birth

    Babies born from multiple-birth pregnancies are much more likely to result in premature birth than those from single pregnancies. 51% of twins and 91% of triplets are born preterm, compared to 9.4% in singletons. [33] 14% of twins and 41% of triplets are even born very preterm, compared to 1.7% in singletons. [33]

  3. List of multiple births - Wikipedia

    en.wikipedia.org/wiki/List_of_multiple_births

    This is a list of multiple births, consisting of notable higher order (4+) multiple births and pregnancies. Twins and triplets are sufficiently common to have their own separate articles. With the use of reproductive technology such as fertility drugs and in vitro fertilization (IVF) such births have become increasingly common. This list ...

  4. Superfecundation - Wikipedia

    en.wikipedia.org/wiki/Superfecundation

    In 1982, twins who were born with two different skin colors were discovered to be conceived as a result of heteropaternal superfecundation. [7] [5] In 1995, a young woman gave birth to diamniotic monochorionic twins, who were originally assumed to be monozygotic twins until a paternity suit led to a DNA test. This led to the discovery that the ...

  5. Gravidity and parity - Wikipedia

    en.wikipedia.org/wiki/Gravidity_and_parity

    A multiple pregnancy (e.g., twins, triplets, etc.) carried to viable gestational age is still counted as 1. [3] Abortus is the number of pregnancies that were lost prior to viable gestational age for any reason, including induced abortions or miscarriages but not stillbirths. The abortus term is sometimes dropped when no pregnancies have been lost.

  6. Selective reduction - Wikipedia

    en.wikipedia.org/wiki/Selective_reduction

    While the data is weak, due to the small sizes of studies and the lack of randomized controlled trials, as of 2017 it appeared that when short term perinatal outcomes in multiple pregnancies reduced to twins are compared to those of non-reduced triplets, there were fewer deaths among the babies born to mothers who underwent reduction, the twins ...

  7. Twin - Wikipedia

    en.wikipedia.org/wiki/Twin

    Multiple pregnancies are much less likely to carry to full term than single births, with twin pregnancies lasting on average 37 weeks, three weeks less than full term. [12] Women who have a family history of fraternal twins have a higher chance of producing fraternal twins themselves, as there is a genetically linked tendency to hyper-ovulate.

  8. Hellin's law - Wikipedia

    en.wikipedia.org/wiki/Hellin's_Law

    Hellin's law, also called Hellin-Zeleny's law, is an empirical observation in demography that the approximate rate of multiple births is one n-tuple birth per 89 n-1 singleton births: twin births occur about once per 89 singleton births, triplets about once per 89 2, quadruplets about once per 89 3, and so on.

  9. Category:Multiple births - Wikipedia

    en.wikipedia.org/wiki/Category:Multiple_births

    Twin (4 C, 27 P) Pages in category "Multiple births" The following 16 pages are in this category, out of 16 total. This list may not reflect recent changes. ...

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