{"term":{"id":"11267","title":"superfecundation","longtitle":"IUPAC Gold Book - superfecundation","doi":"10.1351\/goldbook.11267","code":"11267","status":"current","definitions":[{"id":1,"text":"Fertilization of two or more ova released in the same period of ovulation, either by different males or by the same male in separate acts of intercourse.","notes":{"1":"If there are two or more different fathers, the state may be called heteropaternal superfecundation. Rare in humans, heteropaternal superfecundation is common in some species, such as cats and dogs."},"links":[{"term":"Fertilization","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/10713"},{"term":"ova","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/11060"},{"term":"ovulation","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/11059"}],"sources":["PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 809 (https:\/\/doi.org\/10.1515\/pac-2015-1202)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/11267\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/11267\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/11267\/plain"},"citation":"Citation: 'superfecundation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.11267","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-07-14T03:02:50+00:00"}}