The 63rd JSOR (Japan Society for Ova Research) Meeting was held in Kyoto City. Ms. Narumi OGONUKI made a presentation and won the JSOR Outstanding Presentation Award. Title: Birth of mice from meiotically arrested spermatocyte following biparental meiosis in halved oocytes

The 69th JALAS (Japanese Association for Laboratory Animal Science) Meeting was held in Sendai City, Miyagi Pref. Five members made presentations at the meeting. *Symposium 2* Theme： The Golden Hamster： Revisited old animal models for new ideas Atsuo OGURA: Reproductive and developmental characteristics of the golden hamster and generation of knockout hamsters *LAS Seminar 3*　 Theme: Learn more, laboratory species! Michiko HIROSE: Cute, but so great, “hamster” *Poster Session* Kimiko INOUE：Elucidation of placenta-specific imprinted genes responsible for hyperplasia in somatic cell nuclear transferred placentas　 Ayumi HASEGAWA：Effects of superovulation treatment on pregnancy and strain differences　 Naomi WATANABE：An establishment and characterization of nuclear transfer embryonic stem cells from wild-derived mouse strains　

Dr. Kazuyuki OHBO and Ms. Kuniko NAKAJIMA (Histology and Cell Biology, Yokohama City Univ. Sch. Med.) visited our lab for a technical training of mouse IVF using poorly motile sperm.

On April 7, Dr. Kento Miura, Hiroshima University, came to our lab for a collaborative experiment to generate new mice cloned from T cells.

The FY2021 University of Tsukuba Research Presentation of SPRNG (Support for Pioneering Research Initiated by the Next Generation) was held hybrids. Mr. Daiki SHIKATA made presentation at the poster session. Title： Suppression of endogenous retrovirus ERVK in somatic cell nuclear transfer embryos