Medical term:

superfecundation



superfecundation

 [soo″per-fe″kun-da´shun]
fertilization of two or more ova during the same ovulatory cycle, by separate coital acts.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

superfecundation

(so͞o′pər-fē′kən-dā′shən, -fĕk′ən-)
n.
Fertilization of more than one ovum within a single menstrual cycle by separate acts of coitus, especially by different males.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

superfecundation

Obstetrics Fertilization of a 2nd ovum by sperm from a different act of coitus, after a first ovum has been fertilized; SF explains the rare cases in which twins have different fathers–ouch! See Higher multiples, Twin. Cf Superfetation.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

superfecundation

The fertilization of more than one ovum within a single menstrual cycle by separate acts of coitus, so that twins may be born with different fathers.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005


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