• * The center of assisted medical procreation of the CHU St Pierre is specialised in reproductive medicine. Reference center: quality label ISO 9001 obtained in 2008 and accredited by the AFMPS (Agence Fédérale des Médicaments et Produits de Santé).

The fertilized oocytes then divide to form embryos. The embryologists assess their evolution every day. Each embryo will be assessed according to several criteria (number of cells, regularity of the cells, presence or not of fragments, etc.).


Embryo culture

The best embryos will be chosen for insertion into the uterus, generally on the fifth day after oocyte retrieval. At this stage, the number of cells in the embryo will have significantly increased, the cells will have differentiated and formed the blastocyst. Good quality supernumerary embryos can be frozen. Average quality embryos are left in culture for 1 more day until day 6. If the embryo continues to develop favourably, it will also be frozen.



Good quality embryo day 2



Good quality embryo day 3


Good quality embryo day 5



Plan du site CHU Saint Pierre - Bâtiment 200, 5è étage . Département de Gynécologie-Obstétrique

Centre de Fécondation In vitro - 322, Rue Haute - Bruxelles Tel +32(0)2 535 3406 Fax +32(0)2 535 3409