Invaginations of mesenchymal epithelial tissue, then blood vessels, forms the choroid plexus; choroid plexus continues to develop until birth.
Duration: 31 weeks
Dziegielewska KM, Ek J, Habgood MD, Saunders NR. 2001. Development of the choroid plexus. Microscopy Research and Technique 52(1):5-20.
Neurogenesis of hippocampus, through week 35.9.
Duration: 28 weeks
Bayer SA, Altman J, Russo RJ, Zhang X. 1993. Timetables of neurogenesis in the human brain based on experimentally determined patterns in the rat. Neurotoxicology 14(1):83-144.