1 Department of Hormonal Action Mechanisms, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland. Electronic address: a.ziecik@pan.olsztyn.pl.
2 Department of Reproductive Immunology and Pathology, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland. Electronic address: b.jana@pan.olsztyn.pl.
3 Department of Physiology, University of Turku, Turku, Finland. Electronic address: nafis.rahman@utu.fi.