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With focus on the farm animal embryo, a short overview is given about my research activities over the last 35 years. These activities have been described in five circles, covering different key aspects of my work. The first circle included studies on the basic biology related to oocyte maturation...

Callesen, H.
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Animal Reproduction (Belo Horizonte), 2016, 13, 3, pp 334-339