22.02.2018, Berlin, Berlin, Germany - Artificial insemination. Egg cells are stored frozen in liquid nitrogen in the cryotank. 0MC180222D090CAROEX.JPG [MODEL RELEASE: NOT APPLICABLE, PROPERTY RELEASE: NO (c) caro images / Conradi, http://www.caro-images.com, [email protected] - In case of using the picture for any purpose, please contact the agency - the picture is subject to royalty!]