superfetation

noun

su·​per·​fe·​ta·​tion ˌsü-pər-fē-ˈtā-shən How to pronounce superfetation (audio)
: a progressive accumulation or accretion reaching an excessive degree

Example Sentences

Recent Examples on the Web If superfetation is suspected, a woman's pediatrician can check the maturity of the baby once it's born. Asha C. Gilbert, USA TODAY, 14 Apr. 2021 Her pregnancy was diagnosed as superfetation, a rare condition in which a woman who is already pregnant conceives another baby. Washington Post, 8 Apr. 2021 But fetuses that appear to have different gestational ages aren't necessarily proof of superfetation. Health.com, 2 Nov. 2017 The rare medical phenomenon is known as superfetation, in which a woman continues to ovulate after becoming pregnant. Char Adams, PEOPLE.com, 1 Nov. 2017 The difference in their size was obvious in the first trimester of pregnancy and continued, leading the doctor to offer superfetation as a diagnosis. C. Claiborne Ray, New York Times, 27 Feb. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'superfetation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

Medieval Latin superfetation-, superfetatio, from Latin superfetare to conceive while already pregnant, from super- + fetare to bear young, from fetus newly delivered — more at fetus

First Known Use

1603, in the meaning defined above

Time Traveler
The first known use of superfetation was in 1603

Dictionary Entries Near superfetation

Cite this Entry

“Superfetation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/superfetation. Accessed 8 Dec. 2022.

Medical Definition

superfetation

noun
su·​per·​fe·​ta·​tion
variants or chiefly British superfoetation
: successive fertilization of two or more ova of different ovulations resulting in the presence of embryos of unlike ages in the same uterus
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