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superfetation

American  
[soo-per-fee-tey-shuhn] / ˌsu pər fiˈteɪ ʃən /

noun

  1. the fertilization of an ovum in a female mammal already pregnant.


superfetation British  
/ ˌsuːpəfiːˈteɪʃən /

noun

  1. physiol the presence in the uterus of two fetuses developing from ova fertilized at different times

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of superfetation

1595–1605; < Latin superfētāt ( us ) (past participle of superfētāre to conceive again while still pregnant, equivalent to super- super- + fētā ( re ) to breed ( see fetus) + -tus past participle suffix) + -ion

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Pregnancy normally stops the monthly cycle of ovulation but superfetation allows it to continue.

From BBC Nov. 15, 2016

A rare condition known as superfetation makes it possible to conceive for a second time when pregnant.

From BBC Nov. 15, 2016

It concluded that a phenomenon known as superfetation had occurred.

From Scientific American Apr. 27, 2011

Therefore, for superfetation to be possible, ovulation must be triggered during an ongoing pregnancy.

From Scientific American Apr. 27, 2011

At birth the boy looked premature, about seven months old, which being the case, the girl must have been either a superfetation or a seven months' child also.

From Anomalies and Curiosities of Medicine by Walter L. (Walter Lytle) Pyle

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