989 Maternal and ultrasound characteristics associated with persistence of cell-free DNA from a vanishing twin pregnancy by Dugoff, Lorraine, Kohari, Katherine, Adams, Tracy, Scholl, Jessica, Roman, Ashley S., Berkin, Jill, Hurt, Joseph, Chueh, Jane, Wolf, Samuel, Gorman, Kelly, Palomares, Kristy, Wick, Myra, Al-Khan, Abdulla, Alpay Savasan, Zeynep, Wapner, Ronald J., Livingston, Jeff M., Prigmore, Brittany, Ahmed, Ebad, Butskova, Anastasia, Egbert, Melissa, Vourthis, Sophia, Rochon, Meredith, Souter, Vivienne

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