The procedure of human child making appears pretty simple: egg sperm time= infant. However hold on to your ovaries, folks! It’s pretty unusual, but sometimes, days or weeks after an individual gets pregnant, they can get pregnant once again in a process called superfetation.
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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/101046/ j.1469-0705
https://www.tandfonline.com/doi/abs/101080/ jmf.144.217219
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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