Comparison of cases of spontaneous abortion early in the course of pregnancy with normal and abnormal karyotypes (16 trisomy and 22 trisomy) in which conception was achieved by assisted reproductive technology. (November 2016) - Kokeguchi, Shoji; Matsumoto, Yukiko; Ogata, Seiji; Yamada, Satoshi; Okamoto, Eri; Mizusawa, Yuri; Furuhashi, Kohyu; Shiotani, Masahide