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to prevent further ova becoming fertilized and to help increase the chances of a full-term pregnancy. However, if an ovum is atypically released after the female was already impregnated when previously ovulating, a chance of a second pregnancy occurs, albeit at a different stage of development. This
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Sperm cells can live inside a female's body for up to five days, and once ovulation occurs, the egg remains viable for 12–48 hours before it begins to disintegrate. Superfecundation most commonly happens within hours or days of the first instance of fertilization with ova released during the same
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Heteropaternal superfecundation is common in animals such as cats and dogs. Stray dogs can produce litters in which every puppy has a different sire. Though rare in humans, cases have been documented. In one study on humans, the frequency was 2.4% among
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In 2017, an IVF-implanted surrogate mother gave birth to two children: one genetically unrelated child from an implanted embryo, and a biological child from her own egg and her husband's sperm.
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In 2019, a
Chinese woman was reported to have two babies from different fathers, one of whom was her husband and the other was a man having a secret affair with her during the same time.
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In 2001, a case of spontaneous monopaternal superfecundation was reported after a woman undergoing IVF treatments gave birth to quintuplets after only two embryos were implanted.
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McNamara, Helen C.; Kane, Stefan C.; Craig, Jeffrey M.; Short, Roger V.; Umstad, Mark P. (2016). "A review of the mechanisms and evidence for typical and atypical twinning".
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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 twins had different fathers.
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In 1982, twins who were born with two different skin colors were discovered to be conceived as a result of heteropaternal superfecundation.
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is a form of atypical twinning where, genetically, the twins are half siblings – sharing the same mother, but with different fathers.
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Ambach, E; Parson, W; Brezinka, C (2000). "Superfecundation and dual paternity in a twin pregnancy ending with placental abruption".
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ruled that a man should only pay child support for one of two twins, as he was only the biological father to one of the children.
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supported that the twinning was not a result of the embryos splitting, and that all five boys shared the same father.
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Amsalem, Hagai; Tsvieli, Rimona; Zentner, Bat Sheva; Yagel, Simcha; Mitrani-Rosenbaum, Stella; Hurwitz, Arye (2001).
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Lu, H. L.; Wang, C. X.; Wu, F. Q.; Li, J. J. (1994). "Paternity identification in twins with different fathers".
140:, which can lead to twin babies from two separate biological fathers. The term superfecundation is derived from
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602:"Monopaternal superfecundation of quintuplets after transfer of two embryos in an in vitro fertilization cycle"
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gave birth to twins from two different fathers with whom she had sex on the same day.
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a paternity test on live television established a heteropaternal superfecundation.
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is fertilization of two separate ova from the same father, leading to
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381:"The Science of How Women Can Have Twins With 2 Different Fathers"
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643:"The Maury Show Canceled: A Look Back at the Wildest Moments"
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by Zeus. This happens again; this time Leda bears two sons:
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on the same night, and falls pregnant. She bears two sons;
667:"New Jersey judge rules twin girls have different fathers"
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Wenk, R. E.; Houtz, T; Brooks, M; Chiafari, F. A. (1992).
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Doctors
Discover Dallas Twins Have Two Different Dads
463:"Sperm: How Long Sperm Live, Sperm Count, and More"
49:. Unsourced material may be challenged and removed.
528:"How frequent is heteropaternal superfecundation?"
686:"Surrogate mom delivers two babies, one her own"
241:lies with Zeus, who is disguised as her husband
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493:American Journal of Obstetrics and Gynecology
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280:Selected cases involving superfecundation
109:Learn how and when to remove this message
532:Acta Geneticae Medicae et Gemellologiae
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326:In 2022, a 19-year-old Brazilian from
233:Castor by Tyndareus and Pollux by Zeus
208:holds many cases of superfecundation:
16:Multiple births from different fathers
287:In 1995, a young woman gave birth to
144:, meaning able to produce offspring.
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124:is the fertilization of two or more
47:adding citations to reliable sources
193:whose parents had been involved in
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684:Susan Scutti (November 3, 2017).
744:, Fox News, 2009, archived from
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379:Worland, Justin (May 8, 2015).
184:Heteropaternal superfecundation
154:heteropaternal superfecundation
34:needs additional citations for
1:
619:10.1016/S0015-0282(01)01976-8
171:is normally suspended during
146:Homopaternal superfecundation
782:Journal of Forensic Sciences
641:Griffith, Ivy (2022-03-21).
428:Journal of Forensic Sciences
406:"Public Education Pamphlets"
215:lies with both her husband
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505:10.1016/j.ajog.2015.10.930
545:10.1017/S000156600000249X
201:Cases in Greek mythology
606:Fertility and Sterility
136:from separate acts of
724:. 12 September 2022.
313:In 2015, a judge in
43:improve this article
461:Dunkin, Mary Anne.
350:Polyandry in nature
767:Unknown parameter
340:Chimera (genetics)
249:by Amphitryon and
138:sexual intercourse
58:"Superfecundation"
839:Castor and Pollux
794:10.1520/JFS13689J
440:10.1520/JFS14656J
227:by Tyndareus and
219:and with the god
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844:Clytemnestra
829:Reproduction
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41:Please help
36:verification
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538:(1): 43–7.
345:Mixed twins
275:for Apollo.
813:Categories
752:2009-05-19
704:DailySabah
652:2023-08-17
586:2018-10-13
472:2022-01-06
366:References
355:Polyspermy
315:New Jersey
307:Maury Show
289:diamniotic
243:Amphitryon
160:Conception
69:newspapers
819:Fertility
771:ignored (
390:March 23,
273:Philammon
269:Autolycus
217:Tyndareus
173:pregnancy
169:Ovulation
760:citation
628:11532493
562:23507167
513:26548710
448:10641935
410:sogc.org
334:See also
328:Mineiros
253:by Zeus.
251:Heracles
247:Iphicles
152:, while
99:May 2009
802:8064269
554:1488855
239:Alcmene
165:cycle.
83:scholar
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265:Hermes
261:Apollo
257:Chione
142:fecund
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558:S2CID
467:WebMD
360:Twins
229:Helen
134:sperm
130:cycle
90:JSTOR
76:books
798:PMID
773:help
624:PMID
550:PMID
509:PMID
444:PMID
392:2017
385:Time
263:and
221:Zeus
213:Leda
62:news
790:doi
671:CNN
614:doi
540:doi
501:doi
497:214
436:doi
132:by
126:ova
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