Biological siblings can be born with less than nine months between their ages
the verdict
SUPPORTED
the evidence backs this
confidence 75/100
Biological siblings can be born with less than nine months between their ages through a rare phenomenon known as superfetation, where a new conception occurs during an existing pregnancy.
Evidence for · 5
superfetation
2025 · cited by 0
Defines superfetation as a new conception occurring during an already ongoing pregnancy.
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More for · 4
The concept of superfetation: a critical review on a 'myth' in mammalian reproduction.
2011 · cited by 0
Reviews mammalian reproduction and notes that superfetation implies the presence of young at different developmental stages.
Tubal superfetation following frozen-thawed single-embryo transfers in two separate cycles: Case report and literature review.
2024 · cited by 0
Reports a case of superfetation involving discordant pregnancies.
Superfetation and heterotopic pregnancy: Case report of two rare phenomena coexisting and implications in the era of assisted reproductive technologies.
2024 · cited by 0
Documents a documented case of superfetation resulting in pregnancies at different gestational ages.
Unpredicted ovulations and conceptions during early pregnancy: an explanatory mechanism of human superfetation.
2013 · cited by 0
Explains the mechanism of human superfetation where ovulation, fertilization, and implantation occur during an existing early pregnancy.