I've been trying to dissect mouse epiblast at 5.5 dpc, and am unable to even see and differentiate the embryo from the decidua. I repeatedly end up destroying the decidua. The biggest problem is, I don't really know what I have to look for, if the embryo looks any different than the rest of tissue around, different colour, any specific site to trace it, where exactly to start dissecting from?
I want to generate EpiStem cell lines from these embryos. Can you please also suggest if I should use only PBS as a dissecting media or PBS mixed with a bit of my culture media as well? Any video links would also serve very helpful. Thanks a lot!