In some cases, structures similar to the retina, meninges and hippocampus can form.[1][3] Stem cells have the potential to grow into many different types of tissues, and their fate is dependent on many factors. Below is an image showing some of the chemical factors that can lead stem cells to differentiate into various neural tissues; a more in-depth table of generating specific organoid identity has been published since.[4] Similar techniques are used on stem cells used to grow cerebral organoids.[2]