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The volume of the chorion villosum is associated with the location of the umbilical cord in the first trimester |
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| Authors: | Masamitsu Nakamura Junichi Hasegawa Shoko Hamada Ryu Matsuoka Kiyotake Ichizuka Akihiko Sekizawa Takashi Okai |
| Institution: | Department of Obstetrics and Gynecology, Showa University School of Medicine, Tokyo, Japan |
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