Light micrograph showing a hatching blastocyst,a six days-old human embryo. The blastocyst (left) at six days post-fertilisation is a hollow ball of cells with a fluid centre. Most of these cells will form the placenta & membranes,& only a small group (the inner cell mass) form the embryo proper. Here,the blastocyst is seen emerging from a hole in the zona pellucida (a protein "shell" around the oocyte). At this stage in nature,the blastocyst would be in the uterus & ready to begin implanting into the endometrium (the uterine lining). This image was produced in the course of In Vitro fertilisation research | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / ANDY WALKER, MIDLAND FERTILITY SERVICES |
Taille de l’image : | 5157 px × 3436 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |