The Editorial Board would like to extend sincere thanks to the Reproductive Medicine and Biology reviewers of volume 13 issue 1 to volume 13 issue 4 for their advice and contribution to the both the board and the authors.

Toshiyasu Amano

Tsuyoshi Baba

Tsutomu Douchi

Tomoyuki Fujii

Akihisa Fujimoto

Hiroaki Funahashi

Akiko Hasegawa

Shu Hashimoto

Yasushi Hirota

Toshitaka Horiuchi

Tsuneo Inoue

Hiroshi Ishikawa

Tomomoto Ishikawa

Takeshi Kajihara

Yasushi Kawano

Naoko Kimura

Michio Kitajima

Koji Komatsu

Akira Komiya

Koichi Kyono

Mamiko Maekawa

Hiromichi Matsumoto

Yasuhiro Matsuoka

Hiroshi Matsushita

Katsuya Mine

Yasuyuki Mio

Yasushi Miyagawa

Makoto Orisaka

Masayoshi Saito

Hideya Sakakibara

Hidenori Sasa

Haruaki Sasaki

Kazuo Sengoku

Masayuki Shimada

Yasufumi Shimizu

Koji Shiraishi

Nobuhiko Suganuma

Nobuo Sugawara

Miki Sugimoto

Yoshiki Sugimura

Masashi Takahashi

Yasushi Takai

Isao Tamura

Hiroshi Uchida

Teruhiko Wakayama

Akihiko Watanabe

Gen Watanabe

Gen Yamada

Kohei Yamaguchi

Seiichi Yoshida

Osamu Yoshino

Hiroshi Imai, Editor-in-Chief