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  • Title: Velamentous cord insertion caused by oblique implantation after in vitro fertilization and embryo transfer.
    Author: Hasegawa J, Iwasaki S, Matsuoka R, Ichizuka K, Sekizawa A, Okai T.
    Journal: J Obstet Gynaecol Res; 2011 Nov; 37(11):1698-701. PubMed ID: 21651650.
    Abstract:
    We present a case of a 36-year-old pregnant female after intracytoplasmic sperm injection. Ultrasonographic examination at 8 weeks' gestation revealed umbilical cord insertion with a viable fetus located on the septum membrane of dichorionic twin pregnancy near the anterior wall, while the other fetus was observed to have vanished. Next, this umbilical cord was seen to connect to the anterior wall and the placenta developed on the posterior wall later in the pregnancy. As a result, velamentous cord insertion with long membranous umbilical vessels developed at the time of delivery. The present case indicates that the assessment of the cord insertion site during the early gestation period is very important to predict any abnormality of the cord insertion site at the time of delivery. Furthermore, this case is valuable to understand the pathophysiological development of the placenta and velamentous cord insertion.
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