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  • Title: [Superfetation: case report and review of the literature].
    Author: Pape O, Winer N, Paumier A, Philippe HJ, Flatrès B, Boog G.
    Journal: J Gynecol Obstet Biol Reprod (Paris); 2008 Dec; 37(8):791-5. PubMed ID: 18667283.
    Abstract:
    We report the case of a dichorionic-diamniotic pregnancy in which a discordance in the size of the fetuses was observed as early as the first trimester. This discordance in size was maintained over time and the two fetuses continued their respective growths. We suggest the very rare phenomenon of superfetation as a diagnosis because less than 10 cases are described in the literature. Even though a formal proof of the diagnosis is difficult to obtain, the elements described in this article rally in favor of this hypothesis. Superfetation is defined by the fertilization and the implantation of a second oocyte in a uterus already containing the product of a previous conception. After a description of the case, a review of the literature enables us to describe the frequency, the possible risk factors and the existing case reports on the subject. The rarity of this case justifies its publication for the information of clinicians.
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