Is it actually possible to get pregnant while already pregnant? Turns out, you can. This rare but possible phenomenon is called superfetation—we’ll explain all about it in this new episode of SciShow, hosted by Olivia Gordon!
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Sources:
https://www.ajog.org/article/S0002-9378(15)02235-8/fulltext
https://www.ucsfhealth.org/education/conception_how_it_works/
https://www.britannica.com/science/corpus-luteum
https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/placenta/art-20044425
https://kidshealth.org/en/parents/week7.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6046526/
https://obgyn.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1469-0705.1999.14030219.x
https://www.tandfonline.com/doi/abs/10.1080/jmf.14.4.217.219
https://www.mayoclinic.org/tests-procedures/in-vitro-fertilization/about/pac-20384716
https://www.ncbi.nlm.nih.gov/pubmed/16126061
https://www.healthline.com/health/superfetation#known-cases
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551800/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1626817/
https://www.ncbi.nlm.nih.gov/pubmed/23043772
https://insights.ovid.com/pubmed?pmid=18978637
https://www.ncbi.nlm.nih.gov/pubmed/1031544
https://openaccesspub.org/jfb/article/216
http://www.publish.csiro.au/rd/rd12238
Image Sources:
https://commons.wikimedia.org/wiki/File:Human_Fertilization.png
https://commons.wikimedia.org/wiki/File:Progesterone.svg
https://commons.wikimedia.org/wiki/File:Scheme_female_reproductive_system-en.svg
https://commons.wikimedia.org/wiki/Fi le:Identical-fraternal-sperm-egg.svg
https://commons.wikimedia.org/wiki/File:Uterus_didelphys_0001.jpg
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