Risk factors for placenta accreta spectrum in pregnancies conceived after frozen–thawed embryo transfer in a hormone replacement cycle

Tomoyuki Fujita, Toshiyuki Yoshizato, Hiroshi Mitao, Takuya Shimomura, Takeshi Kuramoto, Hitoshi Obara, Hiroshi Ide, Koga Fumitoshi, Kayoko Kojima, Mari Nomiyama, Mayumi Fukagawa, Yumi Nagata, Atsushi Tanaka, Hiroyuki Yuki, Takafumi Utsunomiya, Hidehiko Matsubayashi, Chikahiro Oka, Kohji Yano, Masahide Shiotani, Masaru Fukuda, Hiromi Hirai, Tatsuyuki Kakuma, Kimio Ushijima