https://www.discoverwildlife.com/animal-facts/what-is-superfetation
What is superfetation? - Discover Wildlife
Feb 17, 2023 - Laurie Jackson explains how superfetation works
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https://www.latintimes.com/woman-gives-birth-superfetation-twins-conceived-3-weeks-apart-467959
Woman Gives Birth To 'Superfetation Twins' Conceived 3 Weeks Apart!
Apr 2, 2021 - Rebecca Roberts gave birth to rare 'super twins' born on same day but conceived weeks apart.
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